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TI-2026-38600 Aliases CVE-2026-53527

LeafWiki Vulnerable to Privilege Escalation via User Self-Service Update

Priority MEDIUM 40CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

LeafWiki is a self-hosted wiki. Versions 0.1.0 through 0.10.0 have a privilege escalation vulnerability in the user update API. An authenticated user could update their own account role and escalate privileges from a regular user, such as `viewer`, to `admin`. Exploitation requires a valid authenticated LeafWiki user account. Instances without public registration and with only trusted users are at lower practical risk. Users should update to version 0.10.1 or greater. Until a patch is available, operators should restrict account creation and ensure that only trusted users have accounts on affected LeafWiki instances. If possible, access to the user update API should be restricted to trusted users or administrators only.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00417 36th percentileScored 2026-11-07
Fix Fixed leafwiki (perber): 0.10.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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

VendorProductAffected versionsFixed inStatusSource
perberleafwiki0.1.0 to before 0.10.10.10.1Patch availableCNA
  • leafwiki Vendorperber Affected 0.1.0 to before 0.10.1 Fixed in 0.10.1 Patch available CNA

Remediation

  • Fix · CNA leafwiki (perber) Fixed in 0.10.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53527

References

Other 1

  • TI-2026-38601 FileWiki has path traversal in RenameAsset via unsanitized oldFilename parameter CVSS 3.1HIGH 8.8
  • TI-2026-55430 LeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consumption via Unbounded ZIP Extraction CVSS 4.0HIGH 7.1
  • TI-2026-38602 LeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title into dangerouslySetInnerHTML) CVSS 4.0MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences