Description

Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset. The webpack developers have discovered a DOM Clobbering vulnerability in Webpack’s `AutoPublicPathRuntimeModule`. The DOM Clobbering gadget in the module can lead to cross-site scripting (XSS) in web pages where scriptless attacker-controlled HTML elements (e.g., an `img` tag with an unsanitized `name` attribute) are present. Real-world exploitation of this gadget has been observed in the Canvas LMS which allows a XSS attack to happen through a javascript code compiled by Webpack (the vulnerable part is from Webpack). DOM Clobbering is a type of code-reuse attack where the attacker first embeds a piece of non-script, seemingly benign HTML markups in the webpage (e.g. through a post or comment) and leverages the gadgets (pieces of js code) living in the existing javascript code to transform it into executable code. This vulnerability can lead to cross-site scripting (XSS) on websites that include Webpack-generated files and allow users to inject certain scriptless HTML tags with improperly sanitized name or id attributes. This issue has been addressed in release version 5.94.0. All users are advised to upgrade. There are no known workarounds for this issue.

Classification

CVE ID: CVE-2024-43788

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.4

Affected Products

Vendor: webpack

Product: webpack

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.06% (probability of being exploited)

EPSS Percentile: 27.38% (scored less or equal to compared to others)

EPSS Date: 2025-02-07 (when was this score calculated)

References

https://github.com/webpack/webpack/security/advisories/GHSA-4vvj-4cpr-p986
https://github.com/webpack/webpack/issues/18718#issuecomment-2326296270
https://github.com/webpack/webpack/commit/955e057abc6cc83cbc3fa1e1ef67a49758bf5a61
https://research.securitum.com/xss-in-amp4email-dom-clobbering
https://scnps.co/papers/sp23_domclob.pdf

Timeline