GHSA-c42h-56wx-h85q: Auth0/login Laravel-auth0 SDK Deserialization Of Untrusted Vulnerability

CRITICAL
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CWE-502 CWE-1395
Published
Advisory Summary

GHSA-c42h-56wx-h85q is a CRITICAL laravel-auth0 sdk deserialization of untrusted vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Auth0/login libraries in the Packagist ecosystem. The issue involves laravel-auth0 sdk deserialization of untrusted data vulnerability. Remediation is available by upgrading affected packages to version 7.2.2.

GHSA-c42h-56wx-h85q at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-c42h-56wx-h85q
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Auth0/login
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix GHSA-c42h-56wx-h85q

To remediate this vulnerability, upgrade all affected Auth0/login dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

auth0/login fixed: 7.2.2 
Upgrade auth0/login to 7.2.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for auth0/login

How to Check if You Are Affected

To determine whether your application is affected by GHSA-c42h-56wx-h85q, inspect your project dependencies for Auth0/login:

inspect dependencies for auth0/login

Analyze the terminal output to locate any version of Auth0/login in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.2.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Auth0/login, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

**Overview** The laravel-auth0 SDK 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: 1. Applications using laravel-auth0 SDK, versions between 7.0.0-BETA1 to 7.2.1. 2. Laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. **Fix** Upgrade Auth0/laravel-auth0 to the latest version (v7.17.0). **Acknowledgement** Okta would like to thank Andreas Forsblom for discovering this vulnerability.

GHSA-c42h-56wx-h85q Affected Auth0/login Versions

1 component(s)
Fixed Versions:
7.2.2
Product / Package Ecosystem Affected Versions Fixed Version
auth0/login
 Packagist
≥ 7.0.0-BETA1
< 7.2.2
7.2.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492
GitHub Advisory / Wiki ADVISORY
https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q
GitHub Advisory / Wiki ADVISORY
https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34
GitHub Advisory / Wiki ADVISORY
https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r
NVD — GHSA-c42h-56wx-h85q NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-48951
Auth0/login Source Repository REPOSITORY
https://github.com/auth0/laravel-auth0

Frequently Asked Questions

What is GHSA-c42h-56wx-h85q?
GHSA-c42h-56wx-h85q is a security vulnerability in Auth0/login involving laravel-auth0 SDK Deserialization of Untrusted Data vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Auth0/login versions are affected?
Affected versions include releases prior to 7.2.2 across affected packages: auth0/login.
What version fixes GHSA-c42h-56wx-h85q?
Upgrading to 7.2.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is auth0/login affected?
Yes, auth0/login is affected in releases prior to 7.2.2. Upgrade your dependency to 7.2.2 or later.
What CWE is associated with GHSA-c42h-56wx-h85q?
GHSA-c42h-56wx-h85q is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Packagist dependencies for GHSA-c42h-56wx-h85q?
Run the dependency tree command: 'inspect dependencies for auth0/login'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c42h-56wx-h85q",
  "modified" : "2025-06-06T15:20:47Z",
  "published" : "2025-06-06T15:20:46Z",
  "aliases" : [ ],
  "summary" : "laravel-auth0 SDK Deserialization of Untrusted Data vulnerability",
  "details" : "**Overview**\nThe laravel-auth0 SDK 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.\n\n\n**Am I Affected?**\nYou are affected by this vulnerability if you meet the following preconditions:\n\n1. Applications using laravel-auth0 SDK, versions between 7.0.0-BETA1 to 7.2.1.\n2. Laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0.\n\n**Fix**\nUpgrade Auth0/laravel-auth0 to the latest version (v7.17.0).\n\n**Acknowledgement**\nOkta would like to thank Andreas Forsblom for discovering this vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "auth0/login"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0-BETA1"
      }, {
        "fixed" : "7.2.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 7.2.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-48951"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/auth0/laravel-auth0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1395", "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-06T15:20:46Z",
    "nvd_published_at" : null
  }
}