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CVE-2021-41268

6.5 · MEDIUM

Symfony/SecurityBundle is the security system for Symfony, a PHP framework for web and console applications and a set of reusable PHP components.

Published Nov 24, 2021CWE-384EPSS 1.32%

Overview

CVE-2021-41268 is a medium-severity vulnerability. It was published on November 24, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Symfony/SecurityBundle is the security system for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Since the rework of the Remember me cookie in version 5.3.0, the cookie is not invalidated when the user changes their password. Attackers can therefore maintain their access to the account even if the password is changed as long as they have had the chance to login once and get a valid remember me cookie. Starting with version 5.3.12, Symfony makes the password part of the signature by default. In that way, when the password changes, then the cookie is not valid anymore.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfcGitHubgithub.com/symfony/symfony/pull/44243GitHubgithub.com/symfony/symfony/releases/tag/v5.3.12GitHubgithub.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqrGitHubgithub.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfcGitHubgithub.com/symfony/symfony/pull/44243GitHubgithub.com/symfony/symfony/releases/tag/v5.3.12GitHubgithub.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqr

How CyberStrike helps

Frequently asked questions

What is CVE-2021-41268?

CVE-2021-41268 is a medium-severity vulnerability. It was published on November 24, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2021-41268?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-41268?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-41268?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-41268 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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