Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK
Overview Session cookies of applications using the Auth0-PHP 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-PHP SDK, or the following SDKs that rely on the Auth0-PHP SDK: a. Auth0/symfony, b. Auth0/laravel-auth0, c. Auth0/wordpress,
- Session storage configured with CookieStore.
Fix Upgrade Auth0/Auth0-PHP to v8.14.0. 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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | auth0/auth0-php | >= 8.0.0-BETA1, < 8.14.0 | 8.14.0 |
References
- https://github.com/auth0/auth0-PHP/security/advisories/GHSA-g98g-r7gf-2r25
- https://github.com/auth0/laravel-auth0/security/advisories/GHSA-9fwj-9mjf-rhj3
- https://github.com/auth0/symfony/security/advisories/GHSA-9wg9-93h9-j8ch
- https://github.com/auth0/wordpress/security/advisories/GHSA-2f4r-34m4-3w8q
- https://nvd.nist.gov/vuln/detail/CVE-2025-47275
- https://github.com/auth0/auth0-PHP/commit/52a79480fdb246f59dbc089b81a784ae049bd389
- https://github.com/auth0/auth0-PHP
- https://github.com/auth0/auth0-PHP/releases/tag/8.14.0
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-287- Platform
- Composer
- Package
auth0/auth0-php- Disclosed
- 16.05.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-g98g-r7gf-2r25 - CC BY 4.0
Vulnerability history: auth0/auth0-php
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 05.2025 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 1
- Medium 1
- Low 1
Disclosures per year
- 2025: 4
- 2026: 1
-
Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK this entry
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