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TI-2021-18100 Aliases CVE-2021-41268GHSA-qw36-p97w-vcqr

Cookie persistence in Symfony

Priority MEDIUM 41CWE-384Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-384.

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.

Why it matters now

EPSS 0.01325 71st percentileScored 2026-11-07
Fix Fixed symfony (symfony): 5.3.12symfony/security-bundle (Packagist): 5.3.12+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
symfonysymfony5.3.0 to before 5.3.125.3.12Patch availableCNA
—symfony/security-bundle (Packagist)5.3.0 to before 5.3.125.3.12Patch availableGHSA-qw36-p97w-vcqr
—symfony/symfony (Packagist)5.3.0 to before 5.3.125.3.12Patch availableGHSA-qw36-p97w-vcqr
  • symfony Vendorsymfony Affected 5.3.0 to before 5.3.12 Fixed in 5.3.12 Patch available CNA
  • symfony/security-bundle (Packagist) Vendor— Affected 5.3.0 to before 5.3.12 Fixed in 5.3.12 Patch available GHSA-qw36-p97w-vcqr
  • symfony/symfony (Packagist) Vendor— Affected 5.3.0 to before 5.3.12 Fixed in 5.3.12 Patch available GHSA-qw36-p97w-vcqr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*5.3.0 to before 5.3.12Vulnerablesensiolabs
  • cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions 5.3.0 to before 5.3.12 Vulnerable ·sensiolabs

Remediation

  • Fix · CNA symfony (symfony) Fixed in 5.3.12
  • Fix · GHSA-qw36-p97w-vcqr symfony/security-bundle (Packagist) Fixed in 5.3.12 Advisory →
  • Fix · GHSA-qw36-p97w-vcqr symfony/symfony (Packagist) Fixed in 5.3.12 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41268
  2. 2026-10-03 Alias added: GHSA-qw36-p97w-vcqr

References

Patch 3

Advisory 2

Other 4

  • TI-2024-33775 Ability to change environment from query in symfony/runtime CVSS 3.1HIGH 7.3
  • TI-2026-34283 Twig: The `spaceless` filter implicitly marks its output as safe CVSS 4.0MEDIUM 5.1
  • TI-2022-07667 Code injection in Twig CVSS 3.1CRITICAL 9.8
  • TI-2018-10028 Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key… CVSS 3.0CRITICAL 9.8
  • TI-2026-35851 Incorrect authorization in symfony CVSS 4.0HIGH 8.7
  • TI-2026-35264 Improper input validation in symfony CVSS 4.0HIGH 8.3
See all 94 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences