CVE-2025-47275
Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK
Description
**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: 1. 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, 2. 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.
How to fix CVE-2025-47275
To remediate CVE-2025-47275, upgrade the affected package to a fixed version below.
- —upgrade to 8.14.0 or later
- —upgrade to 7.17.0 or later
- —upgrade to 5.4.0 or later
- —upgrade to 5.3.0 or later
Is CVE-2025-47275 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 8.0.0-BETA1, < 8.14.0
- from 0, < 7.17.0
- from 0, < 5.4.0
- from 0, < 5.3.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |