Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data
Overview The Auth0 Wordpress plugin contains a critical vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data.
Am I Affected? You are affected by this vulnerability if you meet the following preconditions:
- Applications using the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1.
- Auth0 WordPress plugin uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0.
Fix Upgrade the Auth0 WordPress plugin to the latest version (v5.3.0).
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | auth0/wordpress | >= 5.0.0-BETA0, < 5.1.0 | 5.1.0 |
References
- https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492
- https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q
- https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34
- https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r
- https://nvd.nist.gov/vuln/detail/CVE-2025-48951
- https://github.com/auth0/wordpress
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H- Weakness (CWE)
CWE-502- Platform
- Composer
- Package
auth0/wordpress- Disclosed
- 05.06.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-862m-5253-832r - CC BY 4.0
Vulnerability history: auth0/wordpress
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
- 07.2024 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 1
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 3
- 2026: 1
-
Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data this entry
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