CVE-2021-41268
HIGH
Published Nov 24, 20214y ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
Published Nov 24, 2021 4y ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
No active exploitation signals — not in CISA KEV and no EPSS score yet.
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-384
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| sensiolabs | symfony | * | ≥5.3.0 – <5.3.12 |
References 4
- github.com https://github.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfc
- github.com https://github.com/symfony/symfony/pull/44243
- github.com https://github.com/symfony/symfony/releases/tag/v5.3.12
- github.com https://github.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqr
Remediation
- github.com https://github.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfc
- github.com https://github.com/symfony/symfony/pull/44243
- github.com https://github.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqr