CVE-2023-3519
Actively exploited. CVE-2023-3519 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-07-19) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2023-3519 is indexed in Metasploit, GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
On July 18, 2023, Citrix published a security advisory regarding several vulnerabilities. The most critical, with the CVE ID CVE-2023-3519, allows an unauthenticated attacker to execute arbitrary code remotely. The equipment is vulnerable if configured as...
CSIRTS triage
- What
- An unauthenticated attacker can execute arbitrary code remotely.
- Who is affected
- Deployments of Citrix NetScaler ADC and NetScaler Gateway that are configured in a vulnerable manner.
- Urgency
- Remediation is urgent due to confirmed exploitation of the vulnerability.
- Action
- Apply the latest security updates provided by Citrix.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2023-3519 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (2)
- unknownexploited[Update] Vulnerability in Citrix NetScaler ADC and NetScaler Gateway (July 19, 2023)cert-fr-alerte · 2023-07-19
- criticalexploitedCVE-2023-3519: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerabilitycisa-kev · 2023-07-19
External references
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[](https://www.csirts.com/cve/CVE-2023-3519)