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Vulnerabilities

Vulnerability · 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.

Published May 13, 2026 · catalog updated Jun 17, 2026 · The coreActivity: Activity Logging

Check if you run it

No confirmed exploitation is on record for CVE-2026-7635. EPSS is 0.83%. Act only if a listed version of The coreActivity: Activity Logging is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The coreActivity: Activity Logging).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.83%
Remediation
Version ranges on file
Affected products
stated named in the record

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 on every retrieved in 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 , triggering a Fatal TypeError that creates a persistent Denial of Service condition blocking administrator access to the Logs page entirely.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 3.0

How to fix CVE-2026-7635

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-7635. EPSS is 0.83%. Act only if a listed version of The coreActivity: Activity Logging is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 0.83%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 13, 2026 · NIST NVD

    Detected

    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 on every retrieved in without verifying the data was originally serializ

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 on every retrieved in without verifying the data was originally serializ

Sources

  • CVE.orgVulnerability recordCVE-2026-7635

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-7635

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.