Openproject
CVE-2026-23625
HIGH
Severity by source
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionGitHub 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. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User account with permission to create subprojects and work packages in OpenProject versions 16.3.0-16.6.4. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.7 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 7 days: Identify all affected systems and apply vendor patches promptly. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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