AmauriC tarteaucitron.js up to 1.20.0 addOrUpdate prototype pollution

Summaryinfo

A vulnerability labeled as problematic has been found in AmauriC tarteaucitron.js up to 1.20.0. Impacted is the function addOrUpdate. The manipulation results in prototype pollution. This vulnerability is identified as CVE-2025-31475. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in AmauriC tarteaucitron.js up to 1.20.0. Affected is the function addOrUpdate. The manipulation with an unknown input leads to a prototype pollution vulnerability. CWE is classifying the issue as CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

tarteaucitron.js is a compliant and accessible cookie banner. A vulnerability was identified in tarteaucitron.js prior to 1.20.1, where the addOrUpdate function, used for applying custom texts, did not properly validate input. This allowed an attacker with direct access to the site's source code or a CMS plugin to manipulate JavaScript object prototypes, leading to potential security risks such as data corruption or unintended code execution. An attacker with high privileges could exploit this vulnerability to modify object prototypes, affecting core JavaScript behavior, cause application crashes or unexpected behavior, or potentially introduce further security vulnerabilities depending on the application's architecture. This vulnerability is fixed in 1.20.1.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-31475 since 03/28/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 1.20.1 eliminates this vulnerability. Applying the patch 74c354c413ee3f82dff97a15a0a43942887c2b5b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• JavaScript Library

Vendor

• AmauriC

Name

• tarteaucitron.js

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20.0

License

• open-source

Website

• Product: https://github.com/AmauriC/tarteaucitron.js/

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CPE 2.2info

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