GHSA-9wg9-93h9-j8ch
Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
GHSA-9wg9-93h9-j8ch is a critical vulnerability (CVSS 9.1) in auth0/symfony, published May 17, 2025. No source lists public exploit code. Fixed in auth0/symfony 5.4.0.
- Severity
- 9.1 CriticalCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
5.4.0auth0/symfony +1 more
Description
Overview Session cookies of applications using the Auth0 symfony SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access.
Am I Affected? You are affected by this vulnerability if you meet the following pre-conditions:
- Applications using the Auth0 symfony SDK with version <=5.3.1
- Auth0/Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0.
- Session storage configured with CookieStore.
Fix Upgrade Auth0/symfony to v5.4.0. As an additional precautionary measure, we recommend rotating your cookie encryption keys. Note that once updated, any previous session cookies will be rejected.
Acknowledgement Okta would like to thank Félix Charette for discovering this vulnerability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
auth0/symfonyPackagist | before 5.4.0 | 5.4.0 |
auth0/symfonyPackagist | before 5.4.0, plus listed versions 0.0.10.0.20.0.31.0.01.2.0 Show 39 moreShow less1.2.11.2.101.2.21.2.31.2.41.2.51.2.61.2.71.2.81.2.92.0.02.0.12.0.22.0.33.0.03.0.0-beta.13.0.0-beta.23.0.0-beta.33.0.0-beta.43.0.0-beta.53.0.0-rc.13.0.13.0.23.1.03.2.03.3.03.3.13.4.04.0.05.0.05.0.0-BETA05.0.0-BETA15.1.05.2.05.2.15.2.25.2.35.3.05.3.1 | 5.4.0 |
What each source reports
GitHub Advisories Score used
Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Overview Session cookies of applications using the Auth0 symfony SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access.
Am I Affected? You are affected by this vulnerability if you meet the following pre-conditions:
- Applications using the Auth0 symfony SDK with version <=5.3.1
- Auth0/Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0.
- Session storage configured with CookieStore.
Fix Upgrade Auth0/symfony to v5.4.0. As an additional precautionary measure, we recommend rotating your cookie encryption keys. Note that once updated, any previous session cookies will be rejected.
Acknowledgement Okta would like to thank Félix Charette for discovering this vulnerability.
- Record
GHSA-9wg9-93h9-j8ch- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Overview Session cookies of applications using the Auth0 symfony SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access.
Am I Affected? You are affected by this vulnerability if you meet the following pre-conditions:
- Applications using the Auth0 symfony SDK with version <=5.3.1
- Auth0/Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0.
- Session storage configured with CookieStore.
Fix Upgrade Auth0/symfony to v5.4.0. As an additional precautionary measure, we recommend rotating your cookie encryption keys. Note that once updated, any previous session cookies will be rejected.
Acknowledgement Okta would like to thank Félix Charette for discovering this vulnerability.
- Record
GHSA-9wg9-93h9-j8ch- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.