CVE-2026-7635

Basic Information

Severity HIGH
Base Score 8.1
CNA Wordfence
Published Date 2026-05-13 00:26:39 UTC
Last Modified 2026-05-13 06:22:54 UTC
CVE.org Link https://www.cve.org/CVERecord?id=CVE-2026-7635
NVD https://nvd.nist.gov/vuln/detail/CVE-2026-7635

Description

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.

Affected Products

Vendor Product
gdragon coreactivity: activity logging for wordpress

References

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