CVE•Published 2023-10-10•1 article on news•6 live references•NVD data

CVE-2023-4966

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

9.4

CRITICAL

EPSS percentile

100

Exploit Prediction Scoring System · top 0% of all CVEs

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.

Timeline

Published 2023-10-10

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag21 hosts

vuln:CVE-2023-4966

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Citrix Netscaler Application Delivery Controller" version:"12.1"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"Netscaler Application Delivery Controller"

HTTP body or banner mentions "Netscaler Application Delivery Controller" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

vuln:CVE-2023-4966

Country / ASN / product breakdown for the vuln query.

vulnerabilities.cve_id: CVE-2023-4966

Censys host search filtered to this CVE id.

CVE-2023-4966

Public source-code mentions — fast PoC discovery.

CVE-2023-4966

GitHub code search for direct mentions.

"CVE-2023-4966" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub (8)

CVE-2023-49668 repos

Threekiii/Awesome-POCJava

一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.

★ 5,083·updated 2mo ago

aleff-github/my-flipper-shitsHTML

Free and libre source BadUSB payloads for Flipper Zero. [Windows, GNU/Linux, iOS]

★ 1,793·updated 1w ago

mukul975/cve-mcp-serverPython

Production-grade MCP server giving Claude 27 security intelligence tools across 21 APIs — CVE lookup, EPSS scoring, CISA KEV, MITRE ATT&CK, Shodan, VirusTotal, and more.

★ 1,080·updated 3w ago

izj007/wechatunknown

微信收藏的文章

★ 809·updated 11mo ago

Ostorlab/KEVunknown

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

★ 612·updated 4mo ago

JFR-C/Windows-Penetration-TestingC

Technical notes, AD pentest methodology, list of tools, scripts and Windows commands that are useful for internal penetration tests and assumed breach exercises (red teaming).

★ 321·updated 1mo ago

Threekiii/CVEunknown

一个 CVE 漏洞预警知识库，无 exp/poc，部分包含修复方案。A knowledge base of CVE security vulnerability, no PoCs/exploits.

★ 174·updated 1w ago

win3zz/CVE-2025-5777Python

CVE-2025-5777 (CitrixBleed 2) - Critical memory leak vulnerability affecting Citrix NetScaler ADC and Gateway devices

★ 48·updated 1y ago