#VU105641 Improper Authentication in PHP - CVE-2025-1736

Vulnerability identifier: #VU105641

Vulnerability risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-1736

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in Stream HTTP wrapper header check, which can omit Basic authentication header. A remote attacker can bypass authentication mechanisms that rely on Basic authentication.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.17, 8.4.1 - 8.4.4

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External links
https://www.php.net/archive/2025.php#2025-03-13
https://github.com/php/php-src/security/advisories/GHSA-hgf54-96fm-v528

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.