Wiki.js: Privilege Escalation via Missing Group Validation in users.update
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
Wiki.js is an open source wiki app built on Node.js. Prior to 2.5.313, the users.update GraphQL mutation accepts an arbitrary groups array and applies it directly to the database with no validation of the group IDs supplied. The resolver passes the caller's arguments straight to the model without any ownership check or restriction on which groups can be assigned. A user with manage:users — a permission typically delegated to wiki moderators for account management — can set groups:[1] on their own account to self-assign to the Administrators group. After re-authentication, the fresh JWT carries manage:system, granting full site administrator access in a single mutation call. This vulnerability is fixed in 2.5.313.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA wiki (requarks) Fixed in 2.5.313
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44224
References
More Requarks Wiki.js vulnerabilities
- TI-2021-07999 Requarks wiki.js - Stored Cross-Site Scripting (XSS) in markdown editor CVSS 3.1MEDIUM 5.4
- TI-2025-35387 Requarks Wiki.js 2.5.307 does not properly revoke or invalidate active JWT tokens when a… CVSS 3.1CRITICAL 9.1
- TI-2020-12008 Directory Traversal in Wiki.js CVSS 3.1HIGH 8.6
- TI-2022-07706 Improper write access check in Requarks/wiki CVSS 3.1HIGH 8.1
- TI-2021-19662 Stored XSS in non-image uploads in Requarks/wiki CVSS 3.1HIGH 8.2
- TI-2021-19661 Stored XSS via SVG in Requarks/wiki CVSS 3.1HIGH 8.2
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences