Security readout for executives and security teams
Plain-English summary
A Symfony application could treat a user logged into one protected area as logged into another. This matters when separate application sections use different firewalls or user providers, such as customer and admin areas. The vendor fixed this in Symfony 5.3.2 by keeping authentication tokens scoped to the firewall that created them.
Executive priority
Treat as a prompt maintenance fix for affected Symfony 5.3 systems, not as an emergency based on supplied evidence. Prioritize internet-facing or business-critical applications where customer, employee, or admin areas rely on separate authentication boundaries.
Technical view
Symfony 5.3.0 through before 5.3.2 mishandled firewall authentication token scope. In applications with multiple firewalls, a token authenticated by one firewall was available to other firewalls. This is CWE-287 improper authentication. The patch restricts token availability to the generating firewall.
Likely exposure
Exposure is limited to Symfony applications running 5.3.0 or 5.3.1 that define multiple firewalls, especially with different providers for different application areas. Single-firewall applications are not described as affected by the supplied sources.
Exploitation context
The supplied sources do not show active exploitation, and KEV is false. Abuse requires an authenticated user and a vulnerable multi-firewall configuration. The CVSS vector indicates network access, low privileges, no user interaction, and high confidentiality and integrity impact if conditions fit.
Researcher notes
Focus on whether the application relies on firewall separation for privilege boundaries. The important condition is not Symfony use alone, but Symfony 5.3.0-5.3.1 plus multiple firewalls. Review the advisory and patch commits for token scoping behavior, then validate through application-level authorization tests.
Mitigation direction
- Upgrade affected Symfony packages to version 5.3.2 or later.
- Check Symfony vendor guidance before applying any non-upgrade workaround.
- Inventory applications using Symfony 5.3.0 or 5.3.1.
- Review security configuration for multiple firewalls and distinct providers.
- Add regression tests for cross-firewall authentication boundaries.
Validation and detection
- Check composer.lock for Symfony 5.3.0 or 5.3.1 packages.
- Review security.yaml for multiple firewall definitions.
- Confirm protected areas use the intended providers and access rules.
- Verify authentication state does not carry across unrelated firewalls.
- Run the application unit and regression test suite after upgrading.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32693 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N1.65.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/symfony/symfony/security/advisories/GHSA-rfcf-m67m-jcrqCVE reference · x_refsource_CONFIRM
- https://github.com/symfony/security-http/commit/6bf4c31219773a558b019ee12e54572174ff8129CVE reference · x_refsource_MISC
- https://github.com/symfony/symfony/commit/3084764ad82f29dbb025df19978b9cbc3ab34728CVE reference · x_refsource_MISC
- https://symfony.com/blog/cve-2021-32693-authentication-granted-to-all-firewalls-instead-of-just-oneCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.