CVE-2026-77114
Description
The Document Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'dg_thumber_webhook' Action Request Body in all versions up to, and including, 5.1.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that logging be enabled in the plugin's Advanced settings, which is only the default state when WP_DEBUG is true; otherwise an administrator must manually enable it.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://plugins.trac.wordpress.org/browser/document-gallery/tags/5.1.1/src/admin/tabs/logging-tab.php#L99
- https://plugins.trac.wordpress.org/browser/document-gallery/tags/5.1.1/src/inc/thumbers/class-thumber-co-thumber.php#L181
- https://plugins.trac.wordpress.org/browser/document-gallery/tags/5.1.1/src/inc/thumbers/thumber-co/class-thumber-client.php#L169
- https://plugins.trac.wordpress.org/browser/document-gallery/tags/5.1.1/src/inc/thumbers/thumber-co/thumber-client/client.php#L124
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8ec539ce-aa55-458d-9330-6b6513791ad3?source=cve
CWEs
CWE-79
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.