GHSA-2f4r-34m4-3w8q
Auth0 Wordpress plugin Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Overview Session cookies of applications using the Auth0 Wordpress plugin 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 WordPress Plugin with version <=5.2.1
- Auth0 WordPress Plugin 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/wordpress plugin to v5.3.0. 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
What each source reports
GitHub Advisories Score used
Auth0 Wordpress plugin Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Overview Session cookies of applications using the Auth0 Wordpress plugin 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 WordPress Plugin with version <=5.2.1
- Auth0 WordPress Plugin 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/wordpress plugin to v5.3.0. 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-2f4r-34m4-3w8q- 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 Wordpress plugin Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Overview Session cookies of applications using the Auth0 Wordpress plugin 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 WordPress Plugin with version <=5.2.1
- Auth0 WordPress Plugin 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/wordpress plugin to v5.3.0. 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-2f4r-34m4-3w8q- 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
Affected packages
| Package | Affected | Fixed |
|---|---|---|
auth0/wordpressPackagist | before 5.3.0 | 5.3.0 |
auth0/wordpressPackagist | before 5.3.0, plus listed versions 2.0.02.1.02.1.12.1.112.1.2 Show 45 moreShow less2.1.32.1.42.1.52.1.62.1.72.1.82.1.92.2.03.1.13.1.23.1.33.1.43.10.03.11.03.11.13.11.23.11.33.2.03.2.103.2.143.2.193.2.213.2.223.2.233.2.243.2.253.2.53.2.83.2.93.3.23.4.03.5.03.5.13.5.23.6.03.6.13.6.23.7.03.7.13.7.33.8.03.8.13.9.04.0.04.1.0 | 5.3.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-2f4r-34m4-3w8q is a critical vulnerability (CVSS 9.1) in auth0/wordpress, published May 17, 2025. No source lists public exploit code. Fixed in auth0/wordpress 5.3.0.
References
Left out here: 16 versions. The JSON record has them.