Session Fixation in Symfony security-bundle

Published: 2021-11-25
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-41268
Exploitation vector Network
Public exploit N/A
Vulnerable software
Web applications / Modules and components for CMS

Vendor Symfony

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Session Fixation

EUVDB-ID: #VU58369

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41268

CWE-ID: CWE-384 - Session Fixation

Exploit availability: No


The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to the cookie is not invalidated anymore when the user changes its password. A remote authenticated attacker can maintain their access to the account even if the password is changed.


Install updates from vendor's website.

Vulnerable software versions

security-bundle: 5.3.0 - 5.3.11

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.