CVE-2026-53527: high-severity vulnerability in perber leafwiki
LeafWiki Vulnerable to Privilege Escalation via User Self-Service Update
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
perber · leafwikiRelated CVEs — perber leafwiki
In the same product, most dangerous first.
CVE-2026-80189HIGHLeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consumption via Unbounded ZIP ExtractionEPSS 0.5%CVE-2026-53528HIGHFileWiki has path traversal in RenameAsset via unsanitized oldFilename parameterEPSS 0.5%CVE-2026-53529MEDIUMLeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title into dangerouslySetInnerHTML)EPSS 0.4%