CVE-2025-11834: WP AD Gallery <= 1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-22 · updated 2026-10-08
Weakness: CWE-79

Description

The WP AD Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'startindex' parameter of the ad-gallery shortcode in all versions up to, and including, 1.3. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

wiellyam WP AD Gallery: through 1.3

References

https://plugins.trac.wordpress.org/browser/wp-ad-gallery/tags/1.3/shortcode/shortcode.php#L177
https://www.wordfence.com/threat-intel/vulnerabilities/id/0144ae03-00ce-481d-8d29-7a484f1f6cbf?source=cve

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