Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

• CVE-2025-47275: 0.54% estimated exploitation activity in the next 30 days; percentile 45.44 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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.

Published by the source

16 May 2025, 17:48 UTC

Last modified by the source

22 May 2025, 20:03 UTC

Source last checked

26 Oct 2026, 14:33 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-g98g-r7gf-2r25

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# Patch Next advisory brief: CVE-2025-47275

Advisory: Brute Force Authentication Tags of CookieStore Sessions in Auth0-PHP SDK
IDs: CVE-2025-47275, GHSA-g98g-r7gf-2r25
Record: https://patchnext.com/advisories/cve-2025-47275 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: auth0/auth0-php 8.14.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist auth0/auth0-php: affected >= 8.0.0-BETA1, < 8.14.0; fixed in 8.14.0

## Suggested inspection (read-only)
- Packagist auth0/auth0-php: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on auth0/auth0-php.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g98g-r7gf-2r25 (GitHub-reviewed advisory GHSA-g98g-r7gf-2r25 lists affected ranges: Packagist auth0/auth0-php >=8.0.0-BETA1 <8.14.0)

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