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.
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Affected Vendors & Products
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History
Wed, 13 May 2026 11:30:00 +0000
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Wed, 13 May 2026 11:00:00 +0000
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Gdragon
Gdragon coreactivity: Activity Logging For Wordpress Wordpress Wordpress wordpress |
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Gdragon
Gdragon coreactivity: Activity Logging For Wordpress Wordpress Wordpress wordpress |
Wed, 13 May 2026 04:45:00 +0000
Status: PUBLISHED
Assigner: Wordfence
Published: 2026-05-13T04:26:39.499Z
Updated: 2026-05-13T10:22:54.152Z
Reserved: 2026-05-01T15:23:35.095Z
Link: CVE-2026-7635
Updated: 2026-05-13T10:19:03.402Z
Status : Deferred
Published: 2026-05-13T05:16:24.737
Modified: 2026-05-13T14:43:46.717
Link: CVE-2026-7635
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