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CVE-2026-39802 – Unauthenticated RCE – Everest Backup WordPress Plugin <= 2.3.13

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Summary

CVE-2026-39802 is an unauthenticated remote code execution (RCE) vulnerability in the Everest Backup plugin for WordPress, affecting versions up to and including 2.3.13. It is classed as improper control of code generation (code injection) and has a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: Improper control of generation of code (‘Code Injection’, CWE-94).
  • Trigger conditions: No authentication or user interaction is required. The CVSS vector rates attack complexity as High.
  • Attack vector: Network. A remote attacker can reach the vulnerable plugin over the internet.
  • Impact: Arbitrary code execution on the server, with High impact to confidentiality, integrity and availability.
  • The CVE record does not describe the vulnerable function or code path, and no public exploit details were confirmed.

Affected software

  • Everest Backup WordPress plugin, versions 2.3.13 and earlier.

Severity

  • CVSS v3.1 base score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: The CVE record lists no fixed version, and the WordPress.org plugin page still showed 2.3.13 as the current release when checked. Monitor the vendor’s changelog and the WordPress.org plugin page, and upgrade as soon as a patched release is available.
  • If no patch is available: Deactivate and remove the plugin if it is not essential. Otherwise, restrict access to the site (for example with a WAF or network controls), keep verified offline backups, and monitor for suspicious activity.

References

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