What is the CVSS score of CVE-2026-23625?

CVE-2026-23625 has a CVSS 3.1 base score of 8.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Openproject are affected by CVE-2026-23625?

Organizations using OpenProject face significant risk from CVE-2026-23625, a cross-site scripting vulnerability rated CVSS 8.7.

How to fix or mitigate CVE-2026-23625?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Verify anti-CSRF tokens and content security policies are enforced.

Openproject CVE-2026-23625

HIGH

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

2026-01-19 security-advisories@github.com

XSS Openproject

8.7

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.7 HIGH

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

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

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 19, 2026 - 18:16 nvd

HIGH 8.7

DescriptionGitHub Advisory

OpenProject is an open-source, web-based project management software. Versions 16.3.0 through 16.6.4 are affected by a stored cross-site scripting vulnerability in the Roadmap view. OpenProject’s roadmap view renders the “Related work packages” list for each version. When a version contains work packages from a different project (e.g., a subproject), the helper link_to_work_package prepends package.project.to_s to the link and returns the entire string with .html_safe. Because project names are user-controlled and no escaping happens before calling html_safe, any HTML placed in a subproject name is injected verbatim into the page. The underlying issue is mitigated in versions 16.6.5 and 17.0.0 by setting a X-Content-Type-Options: nosniff header, which was in place until a refactoring move to Rails standard content-security policy, which did not properly apply this header in the new configuration since OpenProject 16.3.0. Those who cannot upgrade their installations should ensure that they add a X-Content-Type-Options: nosniff header in their proxying web application server.

AnalysisAI

Stored XSS in OpenProject versions 16.3.0-16.6.4 allows authenticated users to inject arbitrary HTML/JavaScript through subproject names displayed in the Roadmap view, affecting all users who view the compromised roadmap. An attacker with project creation or modification privileges can craft a malicious project name that executes in victims' browsers when they access the Roadmap, potentially leading to session hijacking or credential theft. No patch is currently available; mitigation is only present in versions 16.6.5 and 17.0.0 through HTTP security headers.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Openproject. OpenProject is an open-source, web-based project management software. Versions 16.3.0 through 16.6.4 are affected by a stored cross-site scripting vulnerability in the Roadmap view. OpenProject’s roadmap view renders the “Related work packages” list for each version. When a version contains work packages from a different project (e.g., a subproject), the helper link_to_work_package prepends package.project.to_s to the link and returns the entire string with .html_safe. Because project names are

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.