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GHSA-7524-3396-fqv3

tarteaucitron.js allows UI manipulation via unrestricted CSS injection

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-31138

Packages

EcosystemPackageAffectedFixed in
npm tarteaucitronjs < 1.20.1 1.20.1

Details

As written in the advisory (Markdown source, shown as plain text).

A vulnerability was identified in `tarteaucitron.js`, where user-controlled inputs for element dimensions (`width` and `height`) were not properly validated. This allowed an attacker with direct access to the site's source code or a CMS plugin to set values like `100%;height:100%;position:fixed;`, potentially covering the entire viewport and facilitating clickjacking attacks. ## Impact An attacker with high privileges could exploit this vulnerability to: - Overlay malicious UI elements on top of legitimate content, - Trick users into interacting with hidden elements (clickjacking), - Disrupt the intended functionality and accessibility of the website. ## Fix https://github.com/AmauriC/tarteaucitron.js/commit/25fcf828aaa55306ddc09cfbac9a6f8f126e2d07 The issue was resolved by enforcing strict validation and sanitization of user-provided CSS values to prevent unintended UI manipulation.

References

External links from the advisory. They lead to third-party sites.