CVE-2025-13762 identifies a vulnerability classified under CWE-20 (Improper Input Validation) in the CyberArk Secure Web Sessions (SWS) Extension for Chrome and Edge browsers. This extension is designed to facilitate secure privileged access by managing web sessions securely. The vulnerability arises because the extension does not properly validate input when initiating new SWS sessions, which can be exploited by an attacker to trigger a denial of service condition. Specifically, when an attacker attempts to start new sessions with malformed or unexpected input, the extension may crash or become unresponsive, disrupting the secure session management process. The flaw affects all versions prior to 2.2.30305. The CVSS 4.0 vector indicates that the attack requires local access (AV:L), has low complexity (AC:L), no privileges (PR:N), and no authentication (AT:N), but requires user interaction (UI:P). The impact is limited to availability (VA:L), with no confidentiality or integrity loss. No known exploits have been reported in the wild, suggesting limited current exploitation but potential for future abuse. The vulnerability's root cause is insufficient input validation, a common software weakness that can lead to unexpected behavior or crashes. CyberArk Secure Web Sessions is widely used in enterprise environments to secure privileged web access, making this vulnerability relevant for organizations relying on this tool for critical security operations.

For European organizations, the primary impact of CVE-2025-13762 is the potential denial of service of the CyberArk Secure Web Sessions Extension, which could disrupt privileged session management workflows. This disruption may delay or prevent administrators from securely accessing critical systems, increasing operational risk and potentially exposing organizations to secondary risks if fallback procedures are insecure. Sectors such as finance, energy, telecommunications, and government, which heavily rely on privileged access management solutions like CyberArk, could face operational downtime or reduced security posture during exploitation. Although the vulnerability does not directly compromise confidentiality or integrity, the availability impact can indirectly affect business continuity and incident response capabilities. Given the medium severity and requirement for user interaction, widespread exploitation is less likely but targeted attacks against high-value organizations remain a concern. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability details are public.

Organizations should proactively monitor CyberArk Secure Web Sessions Extension versions and plan to upgrade to version 2.2.30305 or later once released to address this vulnerability. Until a patch is available, restrict extension usage to trusted users and environments, and implement strict input validation or filtering at the network or endpoint level to detect and block malformed session initiation requests. Employ endpoint detection and response (EDR) tools to monitor for abnormal extension crashes or session failures that could indicate exploitation attempts. Educate users about the risk of interacting with untrusted web content that might trigger the vulnerability. Additionally, review and strengthen fallback access procedures to ensure secure privileged access continuity in case of extension failure. Collaborate with CyberArk support for any interim mitigations or configuration changes that can reduce exposure. Finally, maintain up-to-date threat intelligence feeds to detect emerging exploits targeting this vulnerability.