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CVE-2026-15008 – Unauthenticated PHP Object Injection to RCE via Arbitrary File Deletion – Uncann…

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Summary

CVE-2026-15008 is a high-severity unauthenticated PHP Object Injection vulnerability affecting the Uncanny Automator – Easy Automation, Integration, Webhooks & Workflow Builder Plugin for WordPress in all versions up to and including 7.3.1.4. The flaw resides in the fr_token function and enables unauthenticated attackers to delete arbitrary files on the server, which can directly escalate to Remote Code Execution (RCE). The vulnerability carries a CVSS v3.1 base score of 8.1 (HIGH).

Technical details

  • Root cause: Insufficient file path validation in the fr_token function allows attacker-controlled, maliciously serialized PHP objects to be deserialized without proper sanitization (CWE-502: Deserialization of Untrusted Data).
  • Trigger conditions: Exploitation requires a Forminator form to be connected to an Uncanny Automator recipe configured with the "Everyone" audience setting, enabling unauthenticated form submissions. When this configuration is present, an attacker can supply a malicious serialized payload through the form’s submitted field token.
  • Gadget chain: A self-contained gadget chain exists within the plugin itself via the Action_Helpers_Email __destruct() method. No external POP chain library is required, significantly lowering the barrier to exploitation.
  • Attack vector: Network — no authentication, no privileges, and no user interaction required.
  • Impact: Successful exploitation allows deletion of arbitrary files on the server. Deleting wp-config.php forces WordPress to re-run its installation wizard, enabling an attacker to reconfigure the database connection and gain full administrative control of the site, constituting effective Remote Code Execution.

Affected software

  • Uncanny Automator – Easy Automation, Integration, Webhooks & Workflow Builder Plugin for WordPress: all versions up to and including 7.3.1.4

Severity

  • CVSS v3.1 Base Score: 8.1 (HIGH)
  • Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate action – Patch: Update the Uncanny Automator plugin to version 7.4.0 or later, released July 14, 2026, which hardens token handling in the Forminator integration against PHP Object Injection.
  • Interim workaround: If immediate patching is not possible, disconnect any Forminator forms from Uncanny Automator recipes configured for the "Everyone" audience to eliminate the unauthenticated attack surface until the plugin can be updated.
  • General hardening: Ensure WordPress file system permissions restrict unnecessary write access, and monitor server logs for unexpected file deletions or access to wp-config.php.

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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