How to fix CVE-2025-31476?

During next maintenance window: Identify affected systems and apply vendor patches when convenient. Verify Content-Security-Policy and output encoding.

Is Tarteaucitronjs affected by CVE-2025-31476?

Organizations using tarteaucitron.js should be aware of moderate risk from CVE-2025-31476, a cross-site scripting vulnerability rated CVSS 4.8. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

CVE-2025-31476

MEDIUM

2025-04-07 [email protected]

4.8

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:35 vuln.today

Patch Released

Mar 28, 2026 - 18:35 nvd

Patch available

CVE Published

Apr 07, 2025 - 15:15 nvd

MEDIUM 4.8

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.

Analysis

tarteaucitron.js is a compliant and accessible cookie banner. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

Technical Context

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 include: Amauri Tarteaucitronjs, Tacjs Project Tacjs.

Affected Products

Amauri Tarteaucitronjs, Tacjs Project Tacjs.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.2

CVSS: +24

POC: 0

CVE-2025-31476 vulnerability details – vuln.today

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CVE-2025-31476

CVSS Vector

Lifecycle Timeline

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CVE-2025-31476

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

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External POC / Exploit Code