CVE-2026-42630 in Backup & Restore Manager Plugin
Summary
by MITRE • 10/10/2026
Unauthenticated Sensitive Data Exposure in Web Plura Backup & Restore Manager <= 0.2.25 versions.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as an unauthenticated sensitive data exposure within the Web Plura Backup and Restore Manager, specifically affecting versions up to and including 0.2.25, represents a critical failure in access control mechanisms that allows attackers to retrieve confidential information without valid credentials. This flaw typically stems from improper implementation of authentication checks on administrative endpoints or API routes designed for backup management operations. In many web applications, certain functions such as downloading backups, viewing configuration files, or listing stored data are intended to be restricted to authorized administrators only. However, in this specific instance, the application fails to verify user identity before processing requests directed at these sensitive resources. Consequently, any individual with network access to the service can interact directly with these endpoints using standard HTTP methods such as GET or POST, bypassing the login gateway entirely. This type of vulnerability is formally categorized under CWE-200: Information Exposure, which covers scenarios where an application inadvertently reveals security-relevant information about itself or its users to unauthorized actors.
The technical nature of this flaw often involves missing authorization checks on specific URL paths that handle backup retrieval or restoration tasks. For example, a request targeting /api/backup/download or similar administrative interfaces may return the requested file content directly if the session token is absent or invalid, rather than returning an authentication error. This behavior indicates that the server-side logic relies solely on the presence of certain parameters to determine actionability, neglecting to validate whether the requester possesses the necessary privileges. Such oversights are common in early-stage software development where security testing may be deprioritized in favor of feature delivery. The absence of robust session management or token validation allows attackers to exploit these endpoints systematically. By crafting simple HTTP requests with tools like curl or Burp Suite, an attacker can enumerate available backups, extract database dumps, configuration files containing credentials, or other proprietary data stored by the application for backup purposes.
The operational impact of this vulnerability is severe and multifaceted, primarily centering on the compromise of confidentiality integrity within the affected environment. Since the Backup and Restore Manager handles critical system states, exposing these archives can lead to a complete breach of organizational security posture. Attackers who gain access to backup files may extract plaintext passwords stored in configuration files, database credentials embedded in SQL dumps, or API keys used by internal services. This information serves as a powerful enabler for further attacks, including privilege escalation, lateral movement within the network, and persistent backdoor installation. Furthermore, if the backups contain personally identifiable information (PII) of customers or employees, this exposure may trigger regulatory compliance violations under frameworks such as GDPR or HIPAA, resulting in significant legal and financial repercussions for the organization. The ability to download full system snapshots also allows attackers to analyze application logic flaws more deeply offline, potentially discovering additional vulnerabilities that were not immediately apparent during live exploitation attempts.
From a threat actor perspective, this vulnerability aligns with several tactics defined in the MITRE ATT&CK framework. It directly supports the Initial Access tactic by providing an entry point into restricted areas of the system without needing to compromise user accounts first. Additionally, it facilitates the Collection and Exfiltration phases, as attackers can systematically gather sensitive data from backup archives and transfer them out of the network for analysis or sale on dark web markets. The lack of authentication required makes this a low-effort, high-impact attack vector that is easily automated by script kiddies or advanced persistent threats alike. Organizations relying on these backups for disaster recovery may also face indirect risks if attackers modify backup contents before restoration processes are initiated, although the primary concern here remains data leakage due to unauthenticated access.
To mitigate this vulnerability and restore secure operations, immediate action must be taken to enforce strict authentication controls on all administrative endpoints within the Backup and Restore Manager application. Developers should implement robust session validation middleware that checks for valid tokens or cookies before processing any request related to backup management functions. It is crucial to ensure that no endpoint exposes sensitive data based solely on URL structure without verifying user permissions via role-based access control (RBAC). Upgrading to a patched version of the software, if available from the vendor, is the most effective remediation strategy as it likely includes corrected authorization logic and enhanced security headers. In cases where an upgrade is not immediately feasible, network-level mitigations such as IP whitelisting for administrative interfaces can provide temporary protection by restricting access to trusted internal networks only. Additionally, implementing Web Application Firewall (WAF) rules that detect and block requests lacking valid authentication tokens to known backup endpoints can help reduce the attack surface while permanent fixes are deployed. Regular security audits and penetration testing should be conducted to identify similar misconfigurations in other parts of the application infrastructure, ensuring a holistic approach to securing sensitive data storage and retrieval mechanisms.