CVE-2021-21705
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.
Does this matter?
Lower severity and a low EPSS score (2.09%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 2.09% probability · 81th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- php/php · netapp/clustered data ontap · oracle/sd-wan aware
- Source
- security@php.net
References
- https://bugs.php.net/bug.php?id=81122Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202209-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0006/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Vendor Advisory
- https://bugs.php.net/bug.php?id=81122Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202209-20Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211029-0006/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.