# CVE-2025-48951: Auth0-PHP SDK Deserialization of Untrusted Data vulnerability

> CVE-2025-48951: Auth0-PHP SDK Deserialization of Untrusted Data vulnerability. CVSS 9.3 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2025-48951
Last updated: 2026-06-17T09:30:32Z

- Published: 2025-06-03 20:52 UTC · Updated: 2026-06-17 09:30 UTC · Assigner: GitHub\_M
- CVSS: 9.3 (CVSS 4.0) · Severity: Critical
- EPSS: 0.75%, 55th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-502

## Description

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. Versions 8.0.0-BETA3 prior to 8.3.1 contain a 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. Applications using the Auth0-PHP SDK are affected, as are applications using the Auth0/symfony, Auth0/laravel-auth0, or Auth0/wordpress SDKs, because those SDKsrely on the Auth0-PHP SDK versions from 8.0.0-BETA3 until 8.14.0. Version 8.3.1 contains a patch for the issue.

## Affected vendors and products

- auth0: auth0-PHP

## Tracked companies

- [Auth0](https://rewindex.com/company/auth0.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-48951)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-48951)
- [https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715](https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715)
- [https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492](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/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q)
- [https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34](https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34)
- [https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r](https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2025-48951 · Markdown: https://rewindex.com/cve/CVE-2025-48951.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-48951 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:52.574Z