blogsafe.org My Downloads

BlogSafe.org

WordPress CVEs

Search and review WordPress-related vulnerability records.

← Back to CVE list

CVE-2026-7635

HIGH 8.1 CVSS 3.1
Published
May 13, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-502
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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 WordPress components

  • coreActivity: Activity Logging for WordPress Plugin · coreactivity
    Confirmed match Active
    Up to and including 3.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • gdragon coreActivity: Activity Logging for WordPress — Up to and including 3.0

References

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