CVE-2021-41268
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.32% probability · 71th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-384
- Affected
- sensiolabs/symfony
- Source
- security-advisories@github.com
EPSS 1.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfcPatch, Third Party Advisory
- https://github.com/symfony/symfony/pull/44243Patch, Third Party Advisory
- https://github.com/symfony/symfony/releases/tag/v5.3.12Release Notes, Third Party Advisory
- https://github.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqrPatch, Third Party Advisory
- https://github.com/symfony/symfony/commit/36a808b857cd3240244f4b224452fb1e70dc6dfcPatch, Third Party Advisory
- https://github.com/symfony/symfony/pull/44243Patch, Third Party Advisory
- https://github.com/symfony/symfony/releases/tag/v5.3.12Release Notes, Third Party Advisory
- https://github.com/symfony/symfony/security/advisories/GHSA-qw36-p97w-vcqrPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.