CVE-2026-22604
MEDIUM EPSS 16.7%
Published Jan 10, 20265mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Published Jan 10, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago
Description
OpenProject is an open-source, web-based project management software. For OpenProject versions from 11.2.1 to before 16.6.2, when sending a POST request to the /account/change_password endpoint with an arbitrary User ID as the password_change_user_id parameter, the resulting error page would show the username for the requested user. Since this endpoint is intended to be called without being authenticated, this allows to enumerate the user names of all accounts registered in an OpenProject instance. This issue has been patched in version 16.6.2.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
16.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| openproject | openproject | * | ≥11.2.1 – <16.6.2 |
References 4
- github.com https://github.com/opf/openproject/commit/2cff5e98649e32a197a62659a23dd4b864b7855b
- github.com https://github.com/opf/openproject/pull/3451
- github.com https://github.com/opf/openproject/releases/tag/v16.6.2
- github.com https://github.com/opf/openproject/security/advisories/GHSA-q7qp-p3vw-j2fh
Remediation
- github.com https://github.com/opf/openproject/commit/2cff5e98649e32a197a62659a23dd4b864b7855b
- github.com https://github.com/opf/openproject/security/advisories/GHSA-q7qp-p3vw-j2fh