CVE-2026-89097: Ad Inserter <= 2.8.18 - Authenticated (Subscriber+) Sensitive Information Disclosure in 'ai-debug-processing-fe' & 'ai-debug-meta' URL Parameters
The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.8.18 via the aiwpfooterhook. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract sensitive data including the server's internal IP address, PHP configuration, WordPress and theme versions, hardening constants, the plugin's full block matrix, and all post meta values including underscore-prefixed protected keys such as API tokens and private integration state written by other plugins.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be authenticated to the affected WordPress site with at least Subscriber-level access. No user interaction is required.
What information could be exposed?
The issue can disclose the server's internal IP address, PHP configuration, WordPress and theme versions, hardening constants, and the plugin's full block matrix. It can also expose all post meta values, including protected underscore-prefixed keys such as API tokens and private integration state written by other plugins.
Which installations are affected?
All versions of the Ad Inserter plugin up to and including 2.8.18 are affected. The exposure occurs through the plugin's ai_wp_footer_hook using the ai-debug-processing-fe and ai-debug-meta URL parameters.