CVE-2026-11983: Spacetime Ad Inserter – Ad Manager & Adsense Ads

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 in the `ai_ajax` function. This makes it possible for unauthenticated attackers to view the contents of ad blocks that an administrator has restricted to administrator-only visibility.

Affected products

• Spacetime Ad Inserter – Ad Manager & Adsense Ads: up to and including 2.8.16

Published 2026-08-06. Last modified 2026-08-12.