What’s Vulnerable › Vulnerabilities

CVE-2025-47275: Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-15 · updated 2026-06-17
• Weakness: CWE-287

Description

Auth0-PHP provides the PHP SDK for Auth0 Authentication and Management APIs. Starting in version 8.0.0-BETA1 and prior to version 8.14.0, 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. Certain pre-conditions are required to be vulnerable to this issue: Applications using the Auth0-PHP SDK, or the Auth0/symfony, Auth0/laravel-auth0, and Auth0/wordpress SDKs that rely on the Auth0-PHP SDK; and session storage configured with CookieStore. Upgrade Auth0/Auth0-PHP to v8.14.0 to receive a patch. As an additional precautionary measure, rotating cookie encryption keys is recommended. Note that once updated, any previous session cookies will be rejected.

Affected products

• auth0-PHP: from 8.0.0-BETA1, < 8.14.0

References

• https://github.com/auth0/auth0-PHP/commit/52a79480fdb246f59dbc089b81a784ae049bd389
• https://github.com/auth0/auth0-PHP/releases/tag/8.14.0
• 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

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