CVE-2025-13762

Session-launch denial of service via unvalidated extension input

Published Nov 27, 2025 · Updated Nov 27, 2025

Improper input validation in CyberArk Secure Web Sessions Extension before 2.2.30305 allows attackers to interrupt launches via malicious extensions. The inter-extension interface accepts input from a malicious extension without sufficient validation and enters a denial-of-service condition during session startup. Exploitation requires a locally installed malicious extension; the documented consequence is failure to launch new secure web sessions.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in CyberArk Secure Web Sessions Extension before 2.2.30305 allows attackers to interrupt launches via malicious extensions. The inter-extension interface accepts input from a malicious extension without sufficient validation and enters a denial-of-service condition during session startup. Exploitation requires a locally installed malicious extension; the documented consequence is failure to launch new secure web sessions.

The record

CVE
CVE-2025-13762
Published
Nov 27, 2025
Updated
Nov 27, 2025
Vendor
CyberArk
Product
CyberArk Secure Web Sessions Extension
Classifications
CWE-20, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.2.30305

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

CyberArk · CyberArk Secure Web Sessions Extensionversion=0 <2.2.30305

Published CVSS scores

4.8Government Technology Agency of Singapore Cyber Security GroupCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:A/AU:Y

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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