EUVD-2025-5891

Comprehensive Technical Analysis of EUVD-2025-5891

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the SetSail Membership plugin for WordPress, identified as EUVD-2025-5891 (CVE-2025-1564), is critical. The plugin fails to properly verify a user's identity through the social login mechanism, allowing unauthenticated attackers to log in as any user, including administrators. This vulnerability is rated with a CVSS Base Score of 9.8, indicating a high severity.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:U (Unchanged): The impact scope is unchanged.
• C:H (High Confidentiality Impact): The vulnerability allows for unauthorized access to sensitive information.
• I:H (High Integrity Impact): The vulnerability allows for unauthorized modification of system files or information.
• A:H (High Availability Impact): The vulnerability allows for disruption of service availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: Attackers can exploit the vulnerability without needing any credentials.
• Social Login Bypass: The flaw in the social login mechanism allows attackers to impersonate any user.

Exploitation Methods:

• Credential Stuffing: Attackers can use automated tools to attempt logins using the vulnerability.
• Privilege Escalation: Once logged in as an administrator, attackers can perform actions with elevated privileges.
• Data Exfiltration: Attackers can access and exfiltrate sensitive data, including user information and administrative settings.

3. Affected Systems and Software Versions

Affected Software:

• SetSail Membership plugin for WordPress

Affected Versions:

• All versions up to and including 1.0.3

Vendor:

• Select-Themes

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the SetSail Membership plugin is updated to a version higher than 1.0.3.
• Disable Social Login: Temporarily disable the social login feature until a patch is applied.
• Monitor for Suspicious Activity: Implement monitoring to detect any unusual login attempts or administrative actions.

Long-Term Strategies:

• Regular Patch Management: Establish a routine for regularly updating all plugins and themes.
• Access Controls: Implement strict access controls and multi-factor authentication (MFA) for administrative accounts.
• Security Audits: Conduct regular security audits and vulnerability assessments of all WordPress plugins and themes.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European organizations using the SetSail Membership plugin, particularly those in sectors where data integrity and confidentiality are critical, such as healthcare, finance, and government. The potential for unauthorized access to sensitive data and administrative controls can lead to data breaches, financial loss, and reputational damage.

6. Technical Details for Security Professionals

Vulnerability Details:

• The vulnerability arises from improper identity verification during the social login process.
• Attackers can exploit this by crafting requests that bypass the authentication checks, allowing them to log in as any user.

Detection Methods:

• Log Analysis: Review login logs for unusual or repeated login attempts from unknown IP addresses.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious login activities.
• Web Application Firewalls (WAF): Use WAF to block unauthorized login attempts and monitor for anomalous behavior.

Mitigation Steps:

• Code Review: Conduct a thorough code review of the plugin to identify and fix the authentication bypass issue.
• Security Plugins: Implement security plugins like Wordfence to provide additional layers of protection.
• User Education: Educate users about the importance of strong passwords and the risks associated with social login mechanisms.

References:

• NVD Detail for CVE-2025-1564
• SetSail Travel Agency Theme
• Wordfence Threat Intelligence

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of unauthorized access and protect their digital assets.