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CVE-2026-16618

CRITICAL 9.8 CVSS 3.1
Published
August 4, 2026
Last modified
August 26, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-434
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achieve remote code execution.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Improve SEO — Up to and including 2.0.11

References

  • wpscan.com https://wpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1/
  • nvd.nist.gov Official NVD record