WordPress Plugin Vulnerabilities
Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber Webhook Signature Bypass
Description
The plugin does not verify the signature on one of its unauthenticated webhook endpoints when no shared secret has been configured, which is the default state, allowing unauthenticated users to replace the thumbnail image the site publishes for any document.
Proof of Concept
Affects Plugins
No known fix References
CVE
Classification
Type
SPOOFING
OWASP top 10
CWE
CVSS
Miscellaneous
Submitter
Artus KG
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2026-10-13 (about 5 days ago)
Added
2026-10-06 (about 12 days ago)
Last Updated
2026-10-06 (about 12 days ago)
