tarteaucitron.js allows UI manipulation via unrestricted CSS injection
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | tarteaucitronjs | < 1.20.1 | 1.20.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-1021- Platform
- npm
- Package
tarteaucitronjs- Disclosed
- 07.04.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7524-3396-fqv3 - CC BY 4.0
Vulnerability history: tarteaucitronjs
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 07.2023 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 7
- Low 1
Disclosures per year
- 2023: 1
- 2024: 0
- 2025: 5
- 2026: 2
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