CVE-2021-41268
Cookie persistence in Symfony
- Published
- Nov 24, 2021
- Updated
- Aug 4, 2024
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 69.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- Symfony-CVE-Scanner-PoC-Scanner
CVE-2021-21424 - CRLF Injection - CVE-2021-41268 - Host Header Injection - CVE-2022-24894 - WebProfiler abierto - CVE-2019-10909 - Directory Traversal
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