What is the CVSS score of CVE-2025-27099?

CVE-2025-27099 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:L. EPSS exploitation probability: 0.2%.

Which versions of Tuleap are affected by CVE-2025-27099?

Organizations using Tuleap should be aware of moderate risk from CVE-2025-27099, a cross-site scripting vulnerability rated CVSS 4.8.. A patch is available.

Is there a public PoC exploit available for CVE-2025-27099?

Yes, a public proof-of-concept exploit is available for CVE-2025-27099. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-27099?

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-2025-27099

MEDIUM

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

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

XSS Tuleap

4.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.8 MEDIUM

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

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

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:29 vuln.today

Patch released

Mar 28, 2026 - 18:29 nvd

Patch available

PoC Detected

Jul 10, 2025 - 16:48 vuln.today

Public exploit code

CVE Published

Mar 03, 2025 - 16:15 nvd

MEDIUM 4.8

DescriptionGitHub Advisory

Tuleap is an Open Source Suite to improve management of software developments and collaboration. Tuleap allows cross-site scripting (XSS) via the tracker names used in the semantic timeframe deletion message. A tracker administrator with a semantic timeframe used by other trackers could use this vulnerability to force other tracker administrators to execute uncontrolled code. This vulnerability is fixed in Tuleap Community Edition 16.4.99.1740067916 and Tuleap Enterprise Edition 16.4-5 and 16.3-10.

AnalysisAI

Tuleap is an Open Source Suite to improve management of software developments and collaboration. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

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. Tuleap allows cross-site scripting (XSS) via the tracker names used in the semantic timeframe deletion message. A tracker administrator with a semantic timeframe used by other trackers could use this vulnerability to force other tracker administrators to execute uncontrolled code. This vulnerability is fixed in Tuleap Community Edition 16.4.99.1740067916 and Tuleap Enterprise Edition 16.4-5 and 16.3-10. 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-2025-27099 vulnerability details – vuln.today

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