CVE-2025-1220 Null byte termination in hostnames

What is CVE-2025-1220?

CVE-2025-1220 is a low-severity server-side request forgery vulnerability in Php Php, published on 13 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-918

Which versions are affected by CVE-2025-1220?

3 open source packages ship an affected version, including libphp, php and php-min. It affects 1 product.

Products include Php Php.

How do I fix CVE-2025-1220?

Upgrade libphp to a fixed version for your release line: 8.1.33, 8.2.29, 8.3.23 or 8.4.10.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2025-1220 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1220 exists.

Other vulnerabilities in Php Php

• CVE-2012-2688 Integer overflow in n/a Critical 10.0
• CVE-2012-2376 Memory corruption in n/a Critical 10.0
• CVE-2011-3268 Memory corruption in n/a Critical 10.0
• CVE-2009-4143 Other in n/a Critical 10.0
• CVE-2008-5557 Memory corruption in n/a Critical 10.0

All Php Php vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-65115, AZL-65250, BELL-CVE-2025-1220, BIT-libphp-2025-1220, BIT-php-2025-1220, BIT-php-min-2025-1220 and 13 more.