CVE-2025-48951

Auth0-PHP SDK Deserialization of Untrusted Data vulnerability

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.

Category

9.3
CVSS
Severity: Critical
CVSS 4.0 •
EPSS 0.07%
Affected: auth0 auth0-PHP
Published at:
Updated at:

References

Link Tags
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://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715

Frequently Asked Questions

What is the severity of CVE-2025-48951?
CVE-2025-48951 has been scored as a critical severity vulnerability.
How to fix CVE-2025-48951?
To fix CVE-2025-48951, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-48951 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-48951 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-48951?
CVE-2025-48951 affects auth0 auth0-PHP.
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