CVE-2025-46348

Comprehensive Technical Analysis of CVE-2025-46348

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-46348 CVSS Score: 10

The vulnerability in YesWiki, a PHP-based wiki system, allows unauthenticated users to initiate and download site backups. This flaw exists in versions prior to 4.5.4. The CVSS score of 10 indicates a critical severity due to the potential for significant impact, including data leakage and denial of service (DoS).

Severity Evaluation:

• Confidentiality Impact: High. Sensitive site information can be exposed.
• Integrity Impact: Medium. The integrity of the system can be compromised by filling up the file system.
• Availability Impact: High. The system can be rendered unavailable due to file system exhaustion.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Unauthenticated Backup Initiation: An attacker can trigger the backup process without needing any credentials.
2. Predictable Filenames: The backup archives are created with predictable filenames, making it easy for an attacker to locate and download them.

Exploitation Methods:

1. Data Exfiltration: By downloading the backup archives, an attacker can gain access to sensitive information stored within the wiki.
2. Denial of Service (DoS): An attacker can repeatedly request backups to fill up the file system, leading to a DoS condition.

3. Affected Systems and Software Versions

Affected Software:

• YesWiki versions prior to 4.5.4

Affected Systems:

• Any server or environment running the vulnerable versions of YesWiki.

4. Recommended Mitigation Strategies

1. Upgrade to the Latest Version: Immediately upgrade to YesWiki version 4.5.4 or later, which includes the patch for this vulnerability.
2. Access Controls: Implement strict access controls to ensure that only authenticated users can initiate backups.
3. Monitoring and Logging: Enable comprehensive logging and monitoring to detect and respond to unauthorized backup requests.
4. File System Management: Regularly monitor file system usage and implement quotas to prevent exhaustion.
5. Backup Management: Ensure that backup files are stored securely and are not accessible to unauthorized users.

5. Impact on Cybersecurity Landscape

This vulnerability highlights the importance of robust authentication and authorization mechanisms in web applications. It underscores the need for regular security audits and timely patching of software. The potential for data leakage and DoS attacks can have severe implications for organizations relying on YesWiki for sensitive information management.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: Lack of authentication checks for backup initiation and predictable filenames for backup archives.
• Exploit: An attacker can send a specially crafted HTTP request to trigger the backup process and download the resulting archive.

Patch Information:

• The vulnerability has been addressed in YesWiki version 4.5.4. The patch includes:
  • Authentication checks for backup initiation.
  • Randomization of backup filenames to prevent predictability.

References:

• Patch Commit
• Vendor Advisory

Detection and Response:

• Detection: Implement intrusion detection systems (IDS) to monitor for unauthorized backup requests.
• Response: Develop an incident response plan to address unauthorized access and data exfiltration attempts.

Conclusion: CVE-2025-46348 is a critical vulnerability that requires immediate attention. Organizations using YesWiki should prioritize upgrading to the patched version and implement additional security measures to mitigate the risk of exploitation. Regular security assessments and timely updates are essential to maintain the integrity and availability of web applications.