CVE-2026-30235: opf openproject · Cross-site Scripting
Affects opf openprojectSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 17.2.0 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 17.2.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade openproject and opf/openproject to 17.2.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| opfopenproject | Affected
| Fixed in
|
GitHubopf/openprojectpkg:github/opf/openprojectOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
To mitigate this vulnerability, organizations should upgrade OpenProject to version 17.2.0 or later, where the issue is fixed. Until upgrading is possible, administrators can implement strict input validation and sanitization on Markdown content, particularly scrutinizing hyperlink inputs to prevent injection of malicious payloads. Employing Content Security Policy (CSP) headers can help reduce the impact of injected scripts by restricting script execution sources. Monitoring application logs for unusual JavaScript errors or page crashes can aid in early detection of exploitation attempts. Limiting user privileges to the minimum necessary reduces the attack surface, as exploitation requires at least low privileges. Regularly reviewing and updating third-party dependencies and plugins associated with OpenProject can also prevent similar vulnerabilities. Finally, educating users about the risks of injecting untrusted Markdown content can reduce inadvertent exposure.
Description
OpenProject is an open-source, web-based project management software. Prior to 17.2.0, this vulnerability occurs due to improper validation of OpenProject’s Markdown rendering, specifically in the hyperlink handling. This allows an attacker to inject malicious hyperlink payloads that perform DOM clobbering. DOM clobbering can crash or blank the entire page by overwriting native DOM functions with HTML elements, causing critical JavaScript calls to throw runtime errors during application initialization and halt further execution. This vulnerability is fixed in 17.2.0.