opf openproject up to 16.6.1 /account/change_password password_change_user_id information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in opf openproject up to 16.6.1. This impacts an unknown function of the file /account/change_password. This manipulation of the argument password_change_user_id causes information disclosure. This vulnerability appears as CVE-2026-22604. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in opf openproject up to 16.6.1 and classified as problematic. Affected by this vulnerability is an unknown code of the file /account/change_password. The manipulation of the argument password_change_user_id with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-22604 since 01/07/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 16.6.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2cff5e98649e32a197a62659a23dd4b864b7855b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-1883). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: openproject 16.6.2
Patch: 2cff5e98649e32a197a62659a23dd4b864b7855b

Timelineinfo

01/07/2026 CVE reserved
01/10/2026 +3 days Advisory disclosed
01/10/2026 +0 days VulDB entry created
01/15/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-q7qp-p3vw-j2fh
Status: Confirmed

CVE: CVE-2026-22604 (🔒)
GCVE (CVE): GCVE-0-2026-22604
GCVE (VulDB): GCVE-100-340393
EUVD: 🔒

Entryinfo

Created: 01/10/2026 10:29
Updated: 01/15/2026 12:50
Changes: 01/10/2026 10:29 (73), 01/11/2026 02:39 (1), 01/15/2026 12:50 (10)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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