What is the CVSS score of CVE-2025-27156?

CVE-2025-27156 has a CVSS 3.1 base score of 4.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N. EPSS exploitation probability: 0.2%.

Which versions of Tuleap are affected by CVE-2025-27156?

Organizations using Tuleap should be aware of moderate risk from CVE-2025-27156, a cross-site scripting vulnerability rated CVSS 4.1.. A patch is available.

How to fix or mitigate CVE-2025-27156?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Tuleap CVE-2025-27156

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-03-04 security-advisories@github.com

XSS Tuleap

4.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.1 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:29 vuln.today

Patch released

Mar 28, 2026 - 18:29 nvd

Patch available

CVE Published

Mar 04, 2025 - 17:15 nvd

MEDIUM 4.1

DescriptionGitHub Advisory

Tuleap is an Open Source Suite to improve management of software developments and collaboration. The mass emailing features do not sanitize the content of the HTML emails. A malicious user could use this issue to facilitate a phishing attempt or to indirectly exploit issues in the recipients mail clients. This vulnerability is fixed in Tuleap Community Edition 16.4.99.1740567344 and Tuleap Enterprise Edition 16.4-6 and 16.3-11.

AnalysisAI

Tuleap is an Open Source Suite to improve management of software developments and collaboration. Rated medium severity (CVSS 4.1), 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 ContextAI

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. Tuleap is an Open Source Suite to improve management of software developments and collaboration. The mass emailing features do not sanitize the content of the HTML emails. A malicious user could use this issue to facilitate a phishing attempt or to indirectly exploit issues in the recipients mail clients. This vulnerability is fixed in Tuleap Community Edition 16.4.99.1740567344 and Tuleap Enterprise Edition 16.4-6 and 16.3-11. Affected products include: Enalean Tuleap.

RemediationAI

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.

CVE-2025-27156 vulnerability details – vuln.today

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