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Findings

CVE-2026-4351

The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9.

Published Apr 10, 2026 · updated Jun 17, 2026

The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the method processing the bulk action / handlers without any authorization check or nonce verification. The values are passed unsanitized to / which call then with the traversed path. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite arbitrary files on the server with a fixed PHP docblock content, potentially causing denial of service by corrupting critical files like or .

Code

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

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 10, 2026 · NIST NVD

    Detected

    The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the method processing the bulk action / handlers without any authorization check or nonce verification. The values are passed unsanitized to / which call then with the traversed path. This makes it possible for authenticated attackers, with S

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the method processing the bulk action / handlers without any authorization check or nonce verification. The values are passed unsanitized to / which call then with the traversed path. This makes it possible for authenticated attackers, with S

Sources

  • CVE.orgVulnerability recordCVE-2026-4351

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-4351

    The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the method processing the bulk action / handlers without any authorization

    nvd.nist.gov

References