CVE-2021-21705 Information

Description

In PHP versions 7.3.x below 7.3.29 7.4.x below 7.4.21 and 8.0.x below 8.0.8 when using URL validation functionality via filter_var() function with FILTER_VALIDATE_URL parameter an URL with invalid password field can be accepted as valid. This can lead to the code incorrectly parsing the URL and potentially leading to other security implications - like contacting a wrong server or making a wrong access decision.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://bugs.php.net/bug.php?id=81122 https://security.netapp.com/advisory/ntap-20211029-0006/ https://www.oracle.com/security-alerts/cpujan2022.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3