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CVE-2025-60229 – PHP Object Injection – Themeton Lagom WordPress Theme ≤ 2.0

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Summary

CVE-2025-60229 is a critical Deserialization of Untrusted Data (PHP Object Injection) vulnerability affecting the Themeton Lagom multipurpose WordPress theme in all versions up to and including 2.0. The flaw carries a CVSS v3.1 base score of 9.8 (Critical) and can be exploited remotely by unauthenticated attackers with no user interaction required. No official patch has been released, and the theme has not been updated for over one year.

Technical details

  • Root cause: The theme fails to validate or sanitize serialized data before deserializing it, allowing an attacker-supplied serialized payload to be processed directly by the PHP runtime (CWE-502).

  • Trigger conditions: Exploitation requires no authentication and no user interaction; any network-reachable instance running an affected version of the theme is exposed.

  • Attack vector: Remote, over HTTP/HTTPS; attack complexity is low (AV:N/AC:L/PR:N/UI:N).

  • Impact: If a suitable PHP Object Property (POP) chain is available within the WordPress environment, successful exploitation can lead to code injection, SQL injection, path traversal, denial of service, and potentially full remote code execution. Impact is rated High across Confidentiality, Integrity, and Availability.

Affected software

  • Themeton Lagom WordPress Theme — all versions up to and including 2.0

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)

  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • No official patch is currently available. The Lagom theme has not received an update for over one year and is unlikely to receive a vendor-supplied security fix.

  • Immediate workaround: Deactivating the theme alone is insufficient to eliminate the threat. Organizations should consider replacing Lagom with an actively maintained theme.

  • Virtual patching: Implement a mitigation rule that blocks exploitation attempts at the WAF level until an official patch is available.

  • Network mitigation: If the site cannot be immediately remediated, restrict public HTTP/HTTPS access to the WordPress installation where operationally feasible.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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