CVE-2025-1220: PHP

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 some functions like fsockopen() lack validation that the hostname supplied does not contain null characters. This may lead to other functions like parse_url() treat the hostname in different way, thus opening way to security problems if the user code implements access checks before access using such functions.

Affected products

• PHP PHP: from 8.1.0, before 8.1.33 (fixed in 8.1.33); from 8.2.0, before 8.2.29 (fixed in 8.2.29); from 8.3.0, before 8.3.23 (fixed in 8.3.23); from 8.4.0, before 8.4.10 (fixed in 8.4.10)

Published 2025-07-13. Last modified 2026-06-17.