CVE-2021-23383

CVE-2021-23383 is a critical Prototype Pollution vulnerability affecting Handlebars.js versions prior to 4.7.7, as well as products like NetApp E-Series Performance Analyzer that utilize it. This flaw allows attackers to manipulate object prototypes when compiling untrusted templates, potentially leading to remote code execution. With a CVSS score of 9.8, it represents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness and potential future exploitation.