Observable response discrepancy in Symfony - CVE-2021-21424
Published: May 12, 2021
Vulnerability identifier: #VU53200
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-21424
CWE-ID: CWE-204
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: SensioLabs
Affected software:
Symfony
Symfony
Detailed vulnerability description
The vulnerability allows a remote attacker to enumerate application users.
The vulnerability exists due to application returns different responses based on presence of user account name in application database. A remote attacker enumerate application users.
How to mitigate CVE-2021-21424
Install updates from vendor's website.