Summary
CVE-2026-8457 is a critical unauthenticated authentication bypass in the WPWeb "WooCommerce – Social Login" plugin for WordPress, affecting all versions up to and including 2.8.7. An attacker can forge an Apple id_token and obtain an authenticated session as any existing WordPress user, including administrators. The issue is rated CRITICAL with a CVSS v3.1 base score of 9.8.
Technical details
- Root cause: The plugin’s Apple login handler accepts the Apple
id_tokenand decodes only its base64 payload without verifying the JWT signature against Apple’s public keys, and without validating the issuer, audience, or expiry claims (CWE-289: Authentication Bypass by Alternate Name). - Contributing weakness: The security nonce required to invoke the login flow is exposed to unauthenticated users via a localized JavaScript object on the login page.
- Trigger conditions: An unauthenticated attacker retrieves the exposed nonce and submits a forged
id_tokenwhose payload contains a target user’s email address. - Attack vector: Network, no authentication and no user interaction required.
- Impact: The supplied email is used to resolve a WordPress account without any role exclusion, immediately issuing an authenticated session — enabling full account takeover, including administrator accounts, and complete compromise of confidentiality, integrity, and availability.
Affected software
- WooCommerce – Social Login (WPWeb) — all versions up to and including 2.8.7.
Severity
- CVSS v3.1 base score: 9.8 (Critical)
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Mitigation and recommended actions
- Immediate: Update the plugin to a release newer than 2.8.7. Consult the vendor’s changelog and apply the latest available version.
- If no patch can be applied: Disable or remove the WooCommerce – Social Login plugin until a fixed version is installed. Restrict access to WordPress login and AJAX endpoints at the network or WAF layer, and review user accounts and active sessions for signs of unauthorized administrator access.
How IONIX identifies potentially affected assets
IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.
- Raw HTTP response body:
/wp-content/plugins/woocommerce-social-login/

