In PHP versions 8.1.* before 8.1.28, 8.2.* before 8.2.18, 8.3.* before 8.3.5, when using proc_open() command with array syntax, due to insufficient escaping, if the arguments of the executed command are controlled by a malicious user, the user can supply arguments that would execute arbitrary commands in Windows shell.
CVE ID: CVE-2024-1874
CVSS Base Severity: CRITICAL
CVSS Base Score: 9.4
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Vendor: PHP Group
Product: PHP
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 12.93% (scored less or equal to compared to others)
EPSS Date: 2025-03-14 (when was this score calculated)