CVE-2024-10961: WordPress Social Login Auth Bypass Flaw

CVE-2024-10961 Overview

CVE-2024-10961 is a critical authentication bypass vulnerability affecting the Social Login plugin for WordPress in all versions up to, and including, 5.9.0. The vulnerability stems from insufficient verification of the user being returned by the social login token, allowing unauthenticated attackers to log in as any existing user on the site, including administrators.

Critical Impact

Unauthenticated attackers can bypass authentication and gain full administrative access to WordPress sites using the vulnerable Social Login plugin, potentially leading to complete site compromise.

Affected Products

• Social Login plugin for WordPress versions up to and including 5.9.0
• WordPress sites utilizing social login functionality with this plugin
• Sites where users have registered with email addresses but do not have existing social login accounts

Discovery Timeline

• 2024-11-23 - CVE-2024-10961 published to NVD
• 2024-12-06 - Last updated in NVD database

Technical Details for CVE-2024-10961

Vulnerability Analysis

This authentication bypass vulnerability (CWE-288: Authentication Bypass Using an Alternate Path or Channel) occurs due to improper validation of social login tokens. When a user authenticates via a social login provider, the plugin fails to adequately verify that the social login token corresponds to the intended user account. This weakness allows attackers to manipulate the authentication flow to gain unauthorized access to any existing user account on the WordPress site.

The vulnerability is particularly dangerous because it requires no authentication or privileges to exploit, can be performed over the network, and has the potential to affect confidentiality, integrity, and availability of the target system.

Root Cause

The root cause lies in the insufficient verification logic within the Social Login plugin's token handling mechanism. When processing authentication tokens returned by social login providers, the plugin does not properly validate that the token's associated email address and user identity match a legitimate authentication request. This allows attackers who know a target user's email address to potentially authenticate as that user, provided the target has not already linked a social login account for that specific provider.

Attack Vector

The attack exploits the network-accessible authentication endpoint of the Social Login plugin. An attacker can execute this attack by:

1. Identifying a target WordPress site running the vulnerable Social Login plugin version
2. Determining the email address of a privileged user (such as an administrator)
3. Initiating a social login authentication request while manipulating the token verification process
4. Exploiting the insufficient verification to authenticate as the target user

The attack does not require any prior authentication, does not need user interaction, and can be performed remotely over the network. Technical details about the specific exploitation mechanism can be found in the Wordfence Vulnerability Analysis.

Detection Methods for CVE-2024-10961

Indicators of Compromise

• Unexpected administrator or privileged user login events from unfamiliar IP addresses
• Social login authentication attempts for accounts that typically use standard WordPress authentication
• Multiple failed or successful social login attempts targeting high-privilege accounts
• Unusual activity patterns in WordPress admin dashboards following social login events

Detection Strategies

• Monitor WordPress authentication logs for anomalous social login events, particularly those involving administrator accounts
• Implement alerting for social login authentications from new geographic locations or IP ranges
• Review web server logs for suspicious requests to the Social Login plugin endpoints
• Deploy web application firewall (WAF) rules to detect authentication bypass attempts

Monitoring Recommendations

• Enable detailed logging for all authentication events in WordPress, including social login attempts
• Configure SIEM rules to correlate social login events with subsequent privileged actions
• Regularly audit user account access patterns and alert on deviations from baseline behavior
• Monitor for changes to WordPress configuration or user permissions following authentication events

How to Mitigate CVE-2024-10961

Immediate Actions Required

• Update the Social Login plugin to a version newer than 5.9.0 immediately
• Audit recent authentication logs for signs of unauthorized access
• Review all administrator and privileged user accounts for suspicious activity
• Force password resets for accounts that may have been compromised

Patch Information

The vulnerability has been addressed in versions released after 5.9.0. The security fix can be reviewed in the WordPress Plugin Changeset. Site administrators should update the Social Login plugin through the WordPress admin dashboard or by downloading the latest version directly from the WordPress plugin repository.

Workarounds

• Temporarily disable the Social Login plugin until the update can be applied
• Restrict social login functionality to non-administrative user accounts
• Implement additional authentication factors for administrator accounts
• Consider using WordPress security plugins that provide additional authentication monitoring
• Block suspicious IP addresses at the network or application level

# WordPress CLI command to deactivate the plugin until patched
wp plugin deactivate oa-social-login

# Verify plugin version after update
wp plugin list --name=oa-social-login --fields=name,version,status