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.
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Fixes

Solution

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Workaround

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History

Wed, 14 Jan 2026 22:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:openproject:openproject:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Mon, 12 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 12 Jan 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Openproject
Openproject openproject
Vendors & Products Openproject
Openproject openproject

Sat, 10 Jan 2026 01:45:00 +0000

Type Values Removed Values Added
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.
Title OpenProject is vulnerable to user enumeration via the change password function
Weaknesses CWE-200
References
Metrics cvssV4_0

{'score': 6.9, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-12T19:16:12.780Z

Reserved: 2026-01-07T21:50:39.533Z

Link: CVE-2026-22604

cve-icon Vulnrichment

Updated: 2026-01-12T19:16:10.309Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-10T02:15:49.343

Modified: 2026-01-14T22:27:23.780

Link: CVE-2026-22604

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-12T14:36:56Z

Weaknesses