CVE-2026-77826: CWE-287 Improper Authentication in RegistrationMagic
Description
The RegistrationMagic WordPress plugin before 6.0.9.9 does not verify which application a Facebook access token was issued to before accepting it as proof of identity, allowing unauthenticated attackers to log in as an existing user whose token they can obtain, or to create and log into a new account even when user registration is disabled.
CVSS v3.1
Score 8.8high
Affected software
RegistrationMagic
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-77826 is an improper authentication vulnerability (CWE-287) in the RegistrationMagic WordPress plugin before version 6.0.9.9. The plugin fails to verify which application a Facebook access token was issued to before accepting it as valid authentication. This allows unauthenticated attackers who can obtain a Facebook access token to impersonate existing users or create and log into new accounts despite registration restrictions.
Potential Impact
An attacker can bypass authentication controls by presenting a Facebook access token issued to any application, enabling unauthorized login as existing users or creation of new accounts even when registration is disabled. This can lead to full compromise of user accounts and associated privileges within the affected WordPress site.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch link is provided in the available data. Until a patch is available, consider disabling Facebook login integration or restricting access to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-21T14:42:24.977Z
- State
- PUBLISHED
Threat ID: 6a9bb8b5acd9273b497236ea
Added to database: 09/05/2026, 06:37:41 UTC
Last enriched: 09/07/2026, 11:12:52 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 52
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