EUVD-2026-10472

Comprehensive Technical Analysis of EUVD-2026-10472

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the Tutor LMS Pro plugin for WordPress, specifically in the Social Login addon, allows for authentication bypass. This flaw arises from the plugin's failure to verify that the email provided in the authentication request matches the email from the validated OAuth token. This oversight enables unauthenticated attackers to log in as any existing user, including administrators, by supplying a valid OAuth token from their own account along with the victim's email address.

Severity Evaluation:

• Base Score: 9.8 (CVSS:3.1)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates a critical vulnerability due to the ease of exploitation (low complexity, no user interaction required) and the severe impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Unauthenticated Access: An attacker can exploit this vulnerability without needing any prior authentication.
2. Social Engineering: Attackers could use social engineering techniques to obtain valid OAuth tokens from users.
3. Automated Scripts: Attackers could write automated scripts to exploit this vulnerability en masse, targeting multiple WordPress sites using the Tutor LMS Pro plugin.

Exploitation Methods:

1. Token Interception: Attackers intercept OAuth tokens from legitimate users and use them to authenticate as other users.
2. Email Spoofing: Attackers supply their own OAuth token along with the victim's email address to gain unauthorized access.
3. Brute Force: Attackers could attempt to brute force OAuth tokens if the token generation mechanism is weak.

3. Affected Systems and Software Versions

Affected Systems:

• WordPress sites using the Tutor LMS Pro plugin with the Social Login addon.

Software Versions:

• All versions up to and including 3.9.5.

4. Recommended Mitigation Strategies

1. Immediate Patching: Upgrade the Tutor LMS Pro plugin to a version higher than 3.9.5, ensuring the patch for this vulnerability is applied.
2. Disable Social Login: Temporarily disable the Social Login addon until the patch is applied.
3. Monitoring and Logging: Implement robust monitoring and logging to detect any suspicious login attempts.
4. Two-Factor Authentication (2FA): Enforce 2FA for all administrative accounts to add an extra layer of security.
5. Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for educational institutions and businesses using the Tutor LMS Pro plugin. Unauthorized access to administrative accounts can lead to data breaches, financial loss, and reputational damage. The widespread use of WordPress and the Tutor LMS Pro plugin amplifies the potential impact, making it a critical concern for cybersecurity professionals in Europe.

6. Technical Details for Security Professionals

Vulnerability Details:

• CWE ID: CWE-287 (Improper Authentication)
• Exploitability: The vulnerability can be exploited remotely without any special privileges or user interaction.
• Impact: Full account takeover, including administrative privileges, leading to complete control over the affected WordPress site.

Detection and Response:

1. Intrusion Detection Systems (IDS): Deploy IDS to detect unusual login patterns and OAuth token usage.
2. Security Information and Event Management (SIEM): Use SIEM solutions to correlate and analyze login events for anomalies.
3. Incident Response Plan: Develop and implement an incident response plan specific to authentication bypass vulnerabilities.

Code Review:

• Ensure that the OAuth token validation process includes a strict comparison of the email address provided in the authentication request with the email address associated with the OAuth token.
• Implement additional security checks and logging mechanisms within the authentication process to detect and prevent unauthorized access attempts.

Conclusion: The authentication bypass vulnerability in the Tutor LMS Pro plugin is a critical issue that requires immediate attention. By following the recommended mitigation strategies and maintaining vigilant monitoring, organizations can significantly reduce the risk of exploitation. Cybersecurity professionals should prioritize patching and continuous security assessments to safeguard against similar vulnerabilities in the future.