MEDIUMCVSS 4.3

CVE-2021-21705

CVE-2021-21705 updated by NVD

Modified: 2026-09-20
Sources: nvd

Summary

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.

Affected packages

Ecosystem	Package	Affected versions	Fixed versions
PHP	php	[object Object], [object Object], [object Object]	—

References

https://nvd.nist.gov/vuln/detail/CVE-2021-21705

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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