CVE-2023-27757: Perfree Perfreeblog

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

An arbitrary file upload vulnerability in the /admin/user/uploadImg component of PerfreeBlog v3.1.1 allows attackers to execute arbitrary code via a crafted JPG file.

Affected products

• Perfree Perfreeblog: version 3.1.1 only

Published 2023-03-15. Last modified 2026-06-17.