CVE-2026-11984: Ad Inserter <= 2.8.16 - Missing Authorization to Unauthenticated Header/Footer Code Disclosure via 'ai-debug-code' Parameter

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-16 · updated 2026-09-16
Weakness: CWE-862

Description

The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.8.16 due to a missing capability check on the `ai-debug-code` URL-parameter. This makes it possible for unauthenticated attackers to view administrator-configured header and footer code blocks that have been disabled from public display.

Affected products

spacetime Ad Inserter – Ad Manager & AdSense Ads: through 2.8.16

References

https://plugins.trac.wordpress.org/changeset/3583409/ad-inserter/trunk/ad-inserter.php
https://www.wordfence.com/threat-intel/vulnerabilities/id/95bc1aa4-f517-4921-99c4-f8fe071eafd9?source=cve

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