# Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data

Source: https://junglewise.ai/threats/auth0-wordpress-plugin-vulnerable-to-deserialization-of-untrusted-data-118be347  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-06-05  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 4 · Published 2025-06-05

Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data

Technologies: [auth0/wordpress (Packagist)](https://junglewise.ai/threats/technologies/auth0-wordpress). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Medium severity, with a CVSS score of 4, published 5 June 2025.

**Which products and versions are affected?** auth0/wordpress (Packagist) ECOSYSTEM:introduced=5.0.0-BETA0,fixed=5.1.0.

**Is there a fix for This vulnerability?** Yes. auth0/wordpress (Packagist): upgrade to 5.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run auth0/wordpress (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- auth0/wordpress (Packagist): upgrade to 5.1.0 or later

  ```sh
  composer require auth0/wordpress:^5.1.0
  ```


## Affected products

- auth0/wordpress (Packagist) ECOSYSTEM:introduced=5.0.0-BETA0,fixed=5.1.0

## Related threats

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- [Auth0 Wordpress plugin Vulnerable to Brute Force Authentication Tags of CookieStore Sessions](https://junglewise.ai/threats/auth0-wordpress-plugin-vulnerable-to-brute-force-authentication-tags-of-a3739b95)
- [Login by Auth0 plugin for WordPress vulnerable to Reflected Cross-Site Scripting](https://junglewise.ai/threats/cve-2023-6813-login-by-auth0-plugin-for-wordpress-vulnerable-to-reflected-cross)
- [Duplicate Advisory: Login by Auth0 plugin for WordPress vulnerable to Reflected Cross-Site Scripting](https://junglewise.ai/threats/duplicate-advisory-login-by-auth0-plugin-for-wordpress-vulnerable-to-07c591a4)