Authentication granted with multiple firewalls
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- 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-287.
Summary
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. A vulnerability related to firewall authentication is in Symfony starting with version 5.3.0 and prior to 5.3.2. When an application defines multiple firewalls, the token authenticated by one of the firewalls was available for all other firewalls. This could be abused when the application defines different providers for each part of the application, in such a situation, a user authenticated on a part of the application could be considered authenticated on the rest of the application. Starting in version 5.3.2, a patch ensures that the authenticated token is only available for the firewall that generates it.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| symfony | symfony | 5.3.0 to before 5.3.2 | 5.3.2 | Patch available | CNA |
| — | symfony/security-http (Packagist) | 5.3.0 to before 5.3.2 | 5.3.2 | Patch available | GHSA-rfcf-m67m-jcrq |
| — | symfony/symfony (Packagist) | 5.3.0 to before 5.3.2 | 5.3.2 | Patch available | GHSA-rfcf-m67m-jcrq |
- symfony Vendorsymfony Affected 5.3.0 to before 5.3.2 Fixed in 5.3.2 Patch available CNA
- symfony/security-http (Packagist) Vendor— Affected 5.3.0 to before 5.3.2 Fixed in 5.3.2 Patch available GHSA-rfcf-m67m-jcrq
- symfony/symfony (Packagist) Vendor— Affected 5.3.0 to before 5.3.2 Fixed in 5.3.2 Patch available GHSA-rfcf-m67m-jcrq
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* | 5.3.0 to before 5.3.2 | Vulnerable | sensiolabs |
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions 5.3.0 to before 5.3.2 Vulnerable ·sensiolabs
Remediation
- Fix · CNA symfony (symfony) Fixed in 5.3.2
- Fix · GHSA-rfcf-m67m-jcrq symfony/security-http (Packagist) Fixed in 5.3.2 Advisory →
- Fix · GHSA-rfcf-m67m-jcrq symfony/symfony (Packagist) Fixed in 5.3.2 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-32693
- 2026-10-03 Alias added: GHSA-rfcf-m67m-jcrq
References
Patch 4
- https://github.com/symfony/symfony/security/advisories/GHSA-rfcf-m67m-jcrq
- https://github.com/symfony/security-http/commit/6bf4c31219773a558b019ee12e54572174ff8129
- https://github.com/symfony/symfony/commit/3084764ad82f29dbb025df19978b9cbc3ab34728
- https://symfony.com/blog/cve-2021-32693-authentication-granted-to-all-firewalls-instead-of-just-one
More symfony vulnerabilities
- 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
Sources
- CVE-2021-32693 · CVE Program
- CVE-2021-32693 · NVD
- FIRST EPSS
- GHSA-rfcf-m67m-jcrq · GitHub Advisory Database · CC BY 4.0
- CVE-2021-32693 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences