CVE-2026-107757

13th percentile - higher than 13% of all known CVEs

The Gallery Custom Links plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name (profile.php) + comment (wp-comments-post.php)' parameter in all versions up to, and including, 2.3.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit requires two coordinated inputs from the same authenticated attacker: an HTML comment payload stored in a comment body (preserved verbatim by WordPress comment kses) and a matching simple_html_dom noise key placed in the attacker's display_name (which survives esc_attr() intact), with substitution occurring after both filters have run during the plugin's default-on output-buffering pass over the full rendered page.

The risk includes the possibility of executing malicious scripts in the browsers of users visiting infected pages, which could lead to session theft, personal data theft, or further compromise of the site.

Update the Gallery Custom Links plugin to a patched version and implement additional input sanitization. Also restrict user permissions for commenting and profile editing.