Zero-Day Attacks Exploited Critical Vulnerability in Citrix ADC and Gateway

Citrix is alerting users of a critical security flaw in NetScaler Application Delivery Controller (ADC) and Gateway that it said is being actively exploited in the wild.
Tracked as CVE-2023-3519 (CVSS score: 9.8), the issue relates to a case of code injection that could result in unauthenticated remote code execution. It impacts the following versions -

NetScaler ADC and NetScaler Gateway 13.1

actively exploited adc alerting application application delivery application delivery controller attacks case citrix citrix adc code code execution code injection critical critical vulnerability cve cvss delivery exploited flaw gateway injection issue netscaler remote code remote code execution result score security security flaw vulnerability zero-day