CVE-2026-16618

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.

Score

CVSS 3.1 9.8 Critical

Status

Deferred - contact@wpscan.com

Published

2026-08-04

Last modified

2026-08-04

Weaknesses

CWE-434

Affected products

• Improve Seo (Unknown)

References

• https://wpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1/