Improper authentication in Symfony - CVE-2024-51996

Detailed vulnerability description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error during authentication when using the persisted remember-me cookie. The application does not check if the username persisted in the database matches the username attached with the cookie. A remote non-authenticated attacker can bypass authentication process and gain unauthorized access to the application.

How to mitigate CVE-2024-51996

Sources

• https://github.com/symfony/symfony/security/advisories/GHSA-cg23-qf8f-62rr
• https://github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a