CVE-2026-1426
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Tags
Description
The Advanced AJAX Product Filters plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.9.6 via deserialization of untrusted input in the shortcode_check function within the Live Composer compatibility layer. This makes it possible for authenticated attackers, with Author-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. Note: This vulnerability requires the Live Composer plugin to also be installed and active.
Analysis
PHP Object Injection in the Advanced AJAX Product Filters plugin for WordPress (versions up to 3.1.9.6) allows authenticated authors and above to deserialize malicious objects through the Live Composer compatibility layer. While the plugin itself lacks a gadget chain for exploitation, the vulnerability can enable arbitrary file deletion, data theft, or remote code execution if a POP chain exists in installed themes or plugins. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Audit all installed WordPress plugins and themes to identify potential POP (Property-Oriented Programming) chains that could amplify this vulnerability; document plugin inventory and versions. Within 7 days: Disable the Advanced AJAX Product Filters plugin or implement strict role-based access controls limiting Author-level permissions to trusted users only. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today