Commvault Web Server has an unspecified vulnerability that can be exploited by a remote, authenticated attacker. This vulnerability allows attackers to create and execute webshells, leading to potential unauthorized access and control over affected systems. The severity level of this vulnerability is classified as high, with a CVSS score of 8.7, indicating significant risk to organizations. Given its exploitability status, organizations are urged to take immediate action.
Risk to organizations includes unauthorized access to sensitive data and disruption of services. This vulnerability was added to the CISA Known Exploited Vulnerabilities (KEV) Catalog on April 28, 2025, which highlights its critical nature and the urgency for defenders to address it.
Organizations should prioritize patching immediately. The vulnerability has been addressed in versions 11.36.46, 11.32.89, 11.28.141, and 11.20.217 for both Windows and Linux platforms. Failure to apply the recommended updates may leave systems vulnerable to exploitation.
In summary, the urgency surrounding CVE-2025-3928 requires immediate attention from IT and security teams to mitigate risks and protect organizational assets.
Vulnerability Details
This vulnerability allows remote, authenticated attackers to create and execute webshells on Commvault Web Server. The issue has been officially described in the vendor's advisory, which notes the potential for compromise if exploited. The vulnerability affects all versions of Commvault prior to the specified patched versions, which were released on April 25, 2025.
The CVSS score for this vulnerability is 8.7, indicating a high severity level. The attack vector is network-based, with low attack complexity and low privileges required for exploitation. The potential impacts include high confidentiality, integrity, and availability risks.
Technical Analysis
The root cause of this vulnerability stems from insufficient input validation in the Commvault Web Server. Attackers can exploit this vulnerability by sending crafted requests to the server, which allows them to deploy webshells without requiring significant privileges or user interaction. The attack vector is primarily network-based, with a low attack complexity that enables attackers to exploit the vulnerability easily.
Given the low privileges required and the absence of user interaction, a successful exploitation could lead to high impacts on confidentiality, integrity, and availability, allowing attackers full control over the affected systems.
Risk & Impact Analysis
Real-world deployment risk associated with CVE-2025-3928 is significant. Organizations that utilize Commvault Web Server without updating to the fixed versions are at heightened risk of unauthorized access and potential data breaches. The blast radius of this vulnerability could affect not only the server itself but also any connected systems or services, leading to cascading impacts across the organization.
Organizations should assess the urgency based on the CVSS score of 8.7, indicating high risk. The fact that this vulnerability has been included in the KEV catalog emphasizes the need for immediate action to reduce the risk of exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected versions of Commvault are all versions prior to the fixed releases, specifically: 11.36.46, 11.32.89, 11.28.141, and 11.20.217 for both Windows and Linux platforms.
Mitigation & Remediation
To mitigate the risks associated with CVE-2025-3928, organizations should apply the necessary patches as outlined by Commvault. The fixed versions are: 11.36.46, 11.32.89, 11.28.141, and 11.20.217. If immediate patching is not feasible, organizations should implement network segmentation and monitoring controls to limit exposure.
For further guidance on security practices, organizations can consider engaging in penetration testing to identify potential vulnerabilities and ensure secure configurations.
Detection Guidance
Organizations should monitor logs for any unusual activity related to the Commvault Web Server. Key indicators include unexpected web requests, changes in file permissions, and unauthorized access attempts. Additionally, implementing behavioral anomaly detection can help identify potential exploitation attempts.
AppSecure Threat Intelligence Insight
CVE-2025-3928 highlights the ongoing challenges organizations face with web application vulnerabilities. The trend of attackers leveraging webshells signifies a broader pattern that security teams must address proactively. Security teams should prioritize regular security assessments and vulnerability management programs to stay ahead of emerging threats.
For comprehensive guidance on enhancing security posture, organizations can explore best practices in penetration testing methodology and implement a robust vulnerability management program to identify and remediate vulnerabilities effectively.
Engaging in cloud penetration testing can also provide insights into potential weaknesses in cloud deployments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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