CVE-2021-21705

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.

Weakness classification

• security@php.net: CWE-20
• nvd@nist.gov: CWE-20

Primary references

• security@php.net — Exploit, Issue Tracking, Patch, Vendor Advisory
• security@php.net — Third Party Advisory
• security@php.net — Third Party Advisory
• security@php.net — Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory