CVE-2025-1220
LOWPHP 8.1-8.4 fsockopen - Null Byte Hostname Validation Bypass
Title source: manualDescription
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.
References (3)
Core 3
Core References
Exploit, Vendor Advisory
https://github.com/php/php-src/security/advisories/GHSA-3cr5-j632-f35r
Scores
CVSS v3
3.7
EPSS
0.0016
EPSS Percentile
36.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (1)
php/php
8.1.0 - 8.1.33
Published
Jul 13, 2025
Tracked Since
Feb 18, 2026