CVE-2025-13762: Secure Your Browsing – Denial of Service Found in CyberArk Secure Web Sessions Extension

Overview

CVE-2025-13762 describes an Improper Input Validation vulnerability affecting the CyberArk Secure Web Sessions Extension for Chrome and Edge browsers. This vulnerability can lead to a Denial of Service (DoS) condition when attempting to start new SWS sessions. The issue has been identified in versions prior to 2.2.30305.

Technical Details

The vulnerability stems from insufficient validation of user-supplied input during the initiation of new Secure Web Sessions (SWS). An attacker could potentially exploit this by providing crafted input that causes the extension to crash or become unresponsive, effectively denying service to legitimate users.

While the exact nature of the improper input validation is not publicly detailed, it is important to understand that exploiting this vulnerability requires the attacker to interact with the process of establishing a new SWS session. The specific methods of triggering the improper validation leading to the DoS need further investigation or specific research within a lab environment.

CVSS Analysis

Currently, a CVSS score is not available (N/A) for CVE-2025-13762. This may be due to the newness of the vulnerability or the lack of publicly available information on exploitability. Given the Denial of Service impact, a moderate CVSS score would be expected upon a complete analysis. It’s crucial to monitor for updates from CyberArk or security research communities regarding a calculated CVSS score.

Factors influencing the CVSS score upon determination would include:

• Attack Vector: How easily can an attacker trigger the vulnerability?
• Attack Complexity: How difficult is it to craft the malicious input?
• Privileges Required: What level of access is needed to trigger the vulnerability?
• User Interaction: Does the user need to perform specific actions?
• Scope: Does the vulnerability impact only the extension or the entire browser?
• Confidentiality Impact: Is sensitive information exposed?
• Integrity Impact: Can the attacker modify data or settings?
• Availability Impact: Does the attack cause a denial of service?

Possible Impact

The primary impact of CVE-2025-13762 is a Denial of Service. Users relying on the CyberArk Secure Web Sessions Extension may be unable to establish new secure sessions, disrupting their workflow and potentially impacting productivity. While data confidentiality and integrity are not directly compromised in a simple DoS scenario, prolonged unavailability of secure sessions could lead users to circumvent security measures, indirectly increasing the risk of exposure.

Mitigation and Patch Steps

The recommended mitigation is to update the CyberArk Secure Web Sessions Extension to version 2.2.30305 or later. This version contains the fix for the Improper Input Validation vulnerability.

Update Instructions:

• Chrome:
  1. Open Chrome.
  2. Type chrome://extensions in the address bar and press Enter.
  3. Enable “Developer mode” in the top right corner.
  4. Click the “Update” button.
• Edge:
  1. Open Edge.
  2. Type edge://extensions in the address bar and press Enter.
  3. Enable “Developer mode” in the top right corner.
  4. Click the “Update” button.

Alternatively, you can remove and reinstall the extension to ensure you have the latest version. However, simply reinstalling the extension will only update it if the browser’s automatic update mechanism is configured to do so. It’s recommended to check the extension version after reinstallation.

References

• CyberArk Secure Web Sessions Extension (Chrome Web Store): chromewebstore.google.com
• CyberArk Secure Web Sessions Extension (Microsoft Edge Addons): microsoftedge.microsoft.com
• NIST NVD: nvd.nist.gov (This link will become active once NIST publishes CVE details)
• CyberArk (Official Website): www.cyberark.com