CVE-2025-13762 in Secure Web Sessions Extension
Summary
by MITRE • 11/27/2025
Improper Input Validation vulnerability in CyberArk CyberArk Secure Web Sessions Extension on Chrome, Edge allows Denial of Service when trying to starting new SWS sessions.This issue affects CyberArk Secure Web Sessions Extension: before 2.2.30305.
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Analysis
by VulDB Data Team • 11/27/2025
The vulnerability identified as CVE-2025-13762 represents a critical improper input validation flaw within the CyberArk Secure Web Sessions SWS Extension for Chrome and Edge browsers. This weakness specifically manifests during the initiation of new SWS sessions, creating a potential denial of service condition that could severely impact user productivity and system availability. The affected component operates as a browser extension designed to facilitate secure web session management, making it a critical element in enterprise security infrastructure where uninterrupted access to web applications is essential for business operations.
The technical root cause of this vulnerability stems from inadequate validation of user inputs when establishing new secure web sessions through the browser extension. When users attempt to start new SWS sessions, the extension fails to properly sanitize or validate the input parameters, allowing malformed or malicious data to potentially disrupt the session establishment process. This improper input validation creates an attack surface where an adversary could craft specific inputs designed to trigger the denial of service condition, effectively preventing legitimate users from accessing secure web sessions. The vulnerability is classified under CWE-20, which specifically addresses improper input validation issues, and aligns with ATT&CK technique T1499.004 for network denial of service attacks that target application availability.
The operational impact of this vulnerability extends beyond simple service disruption, as it directly affects enterprise security workflows that depend on the seamless operation of secure web sessions. Organizations utilizing CyberArk SWS Extension for Chrome and Edge may experience complete loss of functionality when attempting to establish new secure sessions, potentially blocking access to critical business applications and systems. This disruption can cascade through enterprise environments where the extension is widely deployed, affecting multiple users simultaneously and creating significant operational challenges for IT support teams. The vulnerability's severity is compounded by the fact that it affects the browser extension layer, meaning that any user attempting to establish new secure sessions will encounter the denial of service condition regardless of their administrative privileges or security clearance levels.
Mitigation strategies for CVE-2025-13762 should prioritize immediate patch deployment to version 2.2.30305 or later, which contains the necessary input validation fixes. Organizations should conduct comprehensive testing of the updated extension in their production environments before full deployment to ensure compatibility with existing security policies and workflows. Network administrators should implement monitoring solutions to detect unusual patterns in SWS session initiation attempts that might indicate exploitation attempts. Additionally, security teams should review their incident response procedures to prepare for potential denial of service events targeting the SWS extension, ensuring that appropriate escalation paths exist for rapid remediation. The fix addresses the underlying CWE-20 vulnerability by implementing proper input sanitization and validation mechanisms that prevent malformed data from disrupting the session establishment process, thereby restoring normal operational functionality to the secure web session extension.