CVE-2023-4966

9.4 CRITICAL CISA KEV - Actively Exploited

Published: October 10, 2023 Modified: October 24, 2025

Description

Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA  virtual server.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html

Source: secure@citrix.com

Third Party Advisory VDB Entry

https://support.citrix.com/article/CTX579459

Source: secure@citrix.com

Vendor Advisory

http://packetstormsecurity.com/files/175323/Citrix-Bleed-Session-Token-Leakage-Proof-Of-Concept.html

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory VDB Entry

https://support.citrix.com/article/CTX579459

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4966

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

5 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.4 / 10.0

EPSS (Exploit Probability)

94.3%

100th percentile

Exploitation Status

Actively Exploited

Remediation due: 2023-11-08

Weaknesses (CWE)

CWE-119

Affected Vendors

citrix

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