Improper privilege management in Wiki.js - #VU128264
Published: April 28, 2026
Vulnerability identifier: #VU128264
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-269
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Requarks.io
Affected software:
Wiki.js
Wiki.js
Detailed vulnerability description
The vulnerability allows a remote user to escalate privileges.
The vulnerability exists due to improper privilege management in the users.update GraphQL mutation when handling user-supplied groups arrays. A remote user can send a crafted mutation assigning the administrators group to their own account to escalate privileges.
Re-authentication is required for the newly assigned group membership to be reflected in the JWT.
Remediation
Install security update from vendor's website.