EUVD-2026-10882

Comprehensive Technical Analysis of EUVD-2026-10882

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability in Parse Server allows for role escalation and Class-Level Permissions (CLP) bypass via direct write access to the _Join table. This vulnerability is critical as it enables unauthorized users to gain elevated privileges and bypass security controls, potentially leading to full system compromise.

Severity Evaluation:

• Base Score: 10.0 (Critical)
• Base Score Version: CVSS 3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

The CVSS score of 10.0 indicates the highest level of severity. The vulnerability can be exploited remotely (AV:N) with low complexity (AC:L), requires no privileges (PR:N), and no user interaction (UI:N). The impact on confidentiality and integrity is high (C:H, I:H), and the availability impact is low (A:L). The scope change (S:C) indicates that the vulnerability affects components beyond the security scope of the vulnerable component.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing to be on the same local network.
• Direct Table Write: The attacker can directly write to the _Join table, which is used to manage role memberships and permissions.

Exploitation Methods:

• Role Escalation: By writing to the _Join table, an attacker can add themselves to roles with higher privileges, effectively escalating their permissions.
• CLP Bypass: The attacker can bypass Class-Level Permissions, allowing them to perform actions that should be restricted by the CLP settings.

3. Affected Systems and Software Versions

Affected Software:

• Parse Server versions prior to 8.6.20
• Parse Server versions between 9.0.0 and 9.5.2-alpha.7

Vendor:

• parse-community

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Software: Upgrade to Parse Server version 8.6.20 or later, or to version 9.5.2-alpha.7 or later if using the 9.x series.
• Access Controls: Implement strict access controls to limit write access to the _Join table.
• Monitoring: Enhance monitoring and logging to detect any unauthorized access or modifications to the _Join table.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Patch Management: Establish a robust patch management process to ensure timely updates and patches.
• Security Training: Provide security training for developers and administrators to understand and mitigate similar vulnerabilities.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• GDPR: Organizations using Parse Server must ensure that they comply with GDPR regulations, especially regarding data protection and breach notification.
• NIS Directive: Critical infrastructure providers must adhere to the Network and Information Systems (NIS) Directive, ensuring robust security measures are in place.

Cybersecurity Posture:

• Increased Risk: The vulnerability poses a significant risk to organizations using Parse Server, potentially leading to data breaches and unauthorized access.
• Reputation Damage: Successful exploitation can result in reputational damage and financial losses.

6. Technical Details for Security Professionals

Vulnerability Details:

• Direct Table Write: The vulnerability allows direct write access to the _Join table, which is used to manage role memberships and permissions.
• Role Escalation: By modifying the _Join table, an attacker can add themselves to roles with higher privileges.
• CLP Bypass: The attacker can bypass Class-Level Permissions, allowing them to perform actions that should be restricted.

Mitigation Steps:

• Code Review: Conduct a thorough code review to identify and fix any similar vulnerabilities.
• Input Validation: Implement robust input validation to prevent unauthorized write access to critical tables.
• Least Privilege: Enforce the principle of least privilege to limit the impact of potential vulnerabilities.

References:

• GitHub Security Advisory
• Parse Server Release 8.6.20
• Parse Server Release 9.5.2-alpha.7
• NVD CVE-2026-30966

By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risk of unauthorized access and data breaches, ensuring the integrity and security of their systems.