CVE-2026-2418: Login with Salesforce Auth Bypass Flaw

CVE-2026-2418 Overview

The Login with Salesforce WordPress plugin through version 1.0.2 contains a critical authentication bypass vulnerability. The plugin fails to validate that users are actually allowed to login through Salesforce, enabling unauthenticated attackers to authenticate as any user—including administrators—simply by knowing the target user's email address.

Critical Impact

Attackers can gain complete administrative access to WordPress sites by exploiting this authentication bypass, potentially leading to full site compromise, data theft, and malware injection.

Affected Products

• Login with Salesforce WordPress Plugin through version 1.0.2

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-2418 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-2418

Vulnerability Analysis

This authentication bypass vulnerability stems from inadequate validation within the Salesforce login integration mechanism. When users attempt to authenticate via the Salesforce SSO flow, the plugin fails to verify whether the user presenting credentials is actually authorized to use Salesforce authentication for the target WordPress account.

The vulnerability is particularly severe because it requires no prior authentication—any external attacker with knowledge of a valid email address associated with a WordPress user account can exploit this flaw. In typical WordPress deployments, administrator email addresses are often discoverable through author pages, comments, or publicly available contact information.

Root Cause

The root cause of this vulnerability is missing authorization checks in the Salesforce authentication callback handler. The plugin appears to trust the email address returned during the SSO flow without verifying:

1. Whether the Salesforce authentication request originated from a legitimate user
2. Whether the WordPress account associated with that email is permitted to use Salesforce authentication
3. Whether proper session binding exists between the authentication request and response

This represents a broken access control vulnerability where the plugin assumes identity based solely on an email parameter without proper validation.

Attack Vector

The attack vector exploits the flawed authentication flow in the Login with Salesforce plugin. An attacker can initiate the Salesforce login process and manipulate or provide an email address belonging to any existing WordPress user, including administrators.

The exploitation process involves:

1. Identifying target WordPress sites using the Login with Salesforce plugin
2. Discovering valid email addresses associated with WordPress user accounts (particularly administrators)
3. Initiating the Salesforce authentication flow
4. Providing or manipulating the email parameter to match the target user
5. Gaining authenticated access as the target user without requiring their actual credentials

For detailed technical analysis, refer to the WPScan Vulnerability Report.

Detection Methods for CVE-2026-2418

Indicators of Compromise

• Unexpected administrator login events from unfamiliar IP addresses or geolocations
• Multiple successful authentications via Salesforce SSO for different user accounts originating from the same source
• Audit log entries showing Salesforce authentication bypassing normal credential validation
• New administrator accounts or elevated privileges without authorized changes

Detection Strategies

• Monitor WordPress authentication logs for Salesforce SSO logins, particularly for administrator accounts
• Implement alerting on login events from new IP addresses or unusual locations for privileged accounts
• Review access logs for patterns indicating authentication enumeration attempts using different email addresses
• Deploy web application firewall (WAF) rules to detect anomalous authentication request patterns

Monitoring Recommendations

• Enable comprehensive WordPress audit logging for all authentication events
• Configure alerts for administrative account access via Salesforce SSO
• Implement session monitoring to detect account takeover patterns
• Regularly audit active sessions and force re-authentication for sensitive operations

How to Mitigate CVE-2026-2418

Immediate Actions Required

• Disable the Login with Salesforce plugin immediately until a patched version is available
• Review authentication logs for any signs of exploitation
• Force password resets and session invalidation for all administrator accounts
• Audit user accounts for unauthorized privilege escalation or newly created admin accounts
• Implement alternative authentication mechanisms with proper validation

Patch Information

At the time of publication, no official patch has been released for this vulnerability. Website administrators should monitor the plugin's official repository and the WPScan Vulnerability Report for updates regarding a security fix.

Workarounds

• Deactivate and remove the Login with Salesforce plugin from production WordPress installations
• Implement IP-based access restrictions for WordPress administrative functions
• Enable two-factor authentication (2FA) as an additional security layer for all user accounts
• Use alternative SSO solutions that have undergone security auditing
• Restrict admin email visibility to reduce attack surface for email-based exploitation

# WordPress CLI - Deactivate the vulnerable plugin
wp plugin deactivate login-with-salesforce --path=/var/www/html

# Verify plugin is deactivated
wp plugin list --status=active --path=/var/www/html | grep salesforce

# Force logout all users as precaution
wp user session destroy --all --path=/var/www/html