CVE-2026-7635

The coreActivity: Activity Logging for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.0. This is due to the plugin failing to validate or strip PHP serialization syntax from the User-Agent HTTP header before storing it in the logmeta table, and subsequently calling `maybe_unserialize()` on every retrieved `meta_value` in `query_metas()` without verifying the data was originally serialized by the application. This makes it possible for unauthenticated attackers to inject a crafted PHP serialized payload via the User-Agent header during any logged event (such as a failed login attempt), which, when an administrator views the Logs page, is deserialized and passed to `DeviceDetector::setUserAgent()`, triggering a Fatal TypeError that creates a persistent Denial of Service condition blocking administrator access to the Logs page entirely.

• CWE-502

• https://github.com/dev4press/coreactivity/pull/3/changes/1f09331d66de7cf4bba9b6e396b0d4e7597fcde2
• https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/log/Core.php#L252
• https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/log/Device.php#L35
• https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/table/Logs.php#L161
• https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268
• https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290
• https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Core.php#L252
• https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Device.php#L35
• https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/table/Logs.php#L161
• https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268
• https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290
• https://www.wordfence.com/threat-intel/vulnerabilities/id/59f30135-6dd9-4367-90a9-a10ad491357d?source=cve

Published

May 13, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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