CVE-2025-57323

CVE-2025-57323 is a Prototype Pollution vulnerability affecting mpregular version 0.2.0 and earlier, specifically within the mp.addEventHandler function. An unauthenticated attacker can exploit this by injecting crafted payloads, leading to a denial-of-service (DoS) condition as the primary impact. With a CVSS score of 7.5 (High), this vulnerability is network-exploitable with low attack complexity and no user interaction required. Currently, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.