CVE-2025-1220

Description

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.

How to fix CVE-2025-1220

To remediate CVE-2025-1220, upgrade the affected package to a fixed version below.

• —upgrade to 8.1.33 or later
• —upgrade to 8.1.33 or later
• —upgrade to 8.1.33 or later

Is CVE-2025-1220 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0, < 8.1.33, >= 8.2.0, < 8.2.29, >= 8.3.0, < 8.3.23, >= 8.4.0, < 8.4.10
• from 0, < 8.1.33, >= 8.2.0, < 8.2.29, >= 8.3.0, < 8.3.23, >= 8.4.0, < 8.4.10
• from 0, < 8.1.33, >= 8.2.0, < 8.2.29, >= 8.3.0, < 8.3.23, >= 8.4.0, < 8.4.10

CVSS scores

References (4)

• WEBwww.openwall.com/lists/oss-security/2025/07/11/4
• WEBgithub.com/php/php-src/security/advisories/GHSA-3cr5-j632-f35r
• WEBlists.debian.org/debian-lts-announce/2025/07/msg00017.html
• WEBnvd.nist.gov/vuln/detail/CVE-2025-1220