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CVE-2026-65571 – Unauthenticated PHP Object Injection – 69 Clothing WordPress Theme <= 1.2.11.1

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Summary

CVE-2026-65571 is an unauthenticated PHP Object Injection vulnerability in the 69 Clothing WordPress theme (by Axiomthemes) affecting all versions up to and including 1.2.11.1. The flaw stems from deserialization of untrusted data (CWE-502) and is rated Critical with a CVSS v3.1 base score of 9.8.

Technical details

  • Root cause: Deserialization of untrusted data (CWE-502), allowing an attacker to inject a crafted PHP object into the application.
  • Trigger conditions: No authentication is required; the injection can be reached by a remote, unauthenticated attacker.
  • Attack vector: Network (AV:N) with low attack complexity and no user interaction.
  • Impact: If a suitable POP (property-oriented programming) gadget chain is present, object injection can lead to high impact on confidentiality, integrity, and availability of the affected site.

Affected software

  • 69 Clothing WordPress theme (Axiomthemes) — all versions up to and including 1.2.11.1.

Severity

  • CVSS v3.1 base score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the 69 Clothing theme to a version later than 1.2.11.1 once a fixed release is available from the vendor.
  • If no patch: Restrict or filter untrusted input reaching the theme, place the site behind a web application firewall to block object-injection payloads, and remove or disable the theme if it is not required until a fix is applied.

References

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