How severe is GHSA-862m-5253-832r?

No CVSS score has been assigned to GHSA-862m-5253-832r yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-862m-5253-832r?

GHSA-862m-5253-832r affects the following packages: auth0/wordpress (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-862m-5253-832r?

Update auth0/wordpress to 5.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-862m-5253-832r is resolved across your whole dependency graph.

How do I detect GHSA-862m-5253-832r in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0/wordpress, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-862m-5253-832r if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Is GHSA-862m-5253-832r actively exploited in the wild?

No public exploit code has been indexed for GHSA-862m-5253-832r yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-862m-5253-832r published, and has it been updated?

GHSA-862m-5253-832r was published on June 5, 2025 and was last updated on February 4, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted DataGHSA-862m-5253-832r

GHSA-862m-5253-832r is a remote code execution vulnerability in auth0/wordpress. A fix is available for auth0/wordpress — see the affected versions and patch details below.

Published

Jun 5, 2025

Updated

Feb 4, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Feb 4, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐘auth0/wordpress

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

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 Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`auth0/wordpress`	≥ 5.0.0-BETA0&&< 5.1.0	5.1.0`composer require auth0/wordpress:^5.1.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0/wordpress, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update auth0/wordpress to 5.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-862m-5253-832r is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

**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: 1. Applications using the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1. 2. Auth0 WordPress plugin uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. **Fix** Upgrade the Auth0 WordPr

O3 Security · Impact-Aware SCA

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