by Kastro
Paper/Archive/CVE-2026-16618

CVE-2026-16618

Unknown Improve SEO — ImproveSEO <= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution

EPSS 0.8%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 57.6.576 × 2011.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Improve SEO≤ 2.0.11–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

exploitwpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1