[MEDIUM] CVE-2021-21424: Prevent user enumeration via response content in authentication mechanisms

PKSA-pwpg-w12v-cgx6 CVE-2021-21424 GHSA-5pv8-ppvj-4h68

Affected package: symfony/security-guard

Affected version: >=2.8.0,<3.0.0|>=3.0.0,<3.1.0|>=3.1.0,<3.2.0|>=3.2.0,<3.3.0|>=3.3.0,<3.4.0|>=3.4.0,<3.4.48|>=4.0.0,<4.1.0|>=4.1.0,<4.2.0|>=4.2.0,<4.3.0|>=4.3.0,<4.4.0|>=4.4.0,<4.4.23|>=5.0.0,<5.1.0|>=5.1.0,<5.2.0|>=5.2.0,<5.2.8

Reported by:
GitHub, FriendsOfPHP/security-advisories