CVE-2025-31476: tarteaucitron.js allows url scheme injection via unfiltered inputs

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-07 · updated 2026-06-17
Weakness: CWE-79

Description

tarteaucitron.js is a compliant and accessible cookie banner. A vulnerability was identified in tarteaucitron.js, allowing a user with high privileges (access to the site's source code or a CMS plugin) to enter a URL containing an insecure scheme such as javascript:alert(). Before the fix, URL validation was insufficient, which could allow arbitrary JavaScript execution if a user clicked on a malicious link. An attacker with high privileges could insert a link exploiting an insecure URL scheme, leading to execution of arbitrary JavaScript code, theft of sensitive data through phishing attacks, or modification of the user interface behavior. This vulnerability is fixed in 1.20.1.

Affected products

Amauri Tarteaucitronjs: before 1.20.1 — fixed in 1.20.1
Drupal TacJS: from 8.x-1.0 before 8.x-6.7 — fixed in 8.x-6.7

How to fix

Upgrade to a fixed version: Amauri Tarteaucitronjs 1.20.1; Drupal TacJS 8.x-6.7. Check the vendor advisory for mitigations.

References

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