Authorization bypass through user-controlled key in Wiki.js - #VU151564
Published: September 22, 2026
Vulnerability identifier: #VU151564
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to take over administrative accounts and cause an administrative lockout.
The vulnerability exists due to improper access control in the Wiki.js GraphQL user-management resolvers when handling mutations with arbitrary target user IDs. A remote user can modify passwords, disable TFA, or remove group memberships of more-privileged accounts to take over administrative accounts and cause an administrative lockout.
Exploitation requires an account with the manage:users permission.
Affected software
Wiki.js
Remediation
Install security update from vendor's website.
Wiki.js - update to 2.5.315