CVE-2021-4097: Phpservermonitor PHP Server Monitor

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

phpservermon is vulnerable to Improper Neutralization of CRLF Sequences

Affected products

• Phpservermonitor PHP Server Monitor: before 3.6.0 (fixed in 3.6.0)

Published 2021-12-12. Last modified 2026-06-17.