How to fix 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.

Is Tuleap 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. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2025-27099

MEDIUM

2025-03-03 [email protected]

4.8

CVSS 3.1

CVSS Vector

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

Description

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.

Analysis

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 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. 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.

Affected Products

Enalean Tuleap.

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: +20

CVE-2025-27099 vulnerability details – vuln.today

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CVE-2025-27099

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CVE-2025-27099

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Technical Context

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External POC / Exploit Code