H2O-3 JDBC Deserialization Vulnerability (CVE-2025-6544)
September 23, 2025
Overview Recently, NSFOCUS CERT detected that H2O-3 released a security update to fix the H2O-3 JDBC deserialization vulnerability (CVE-2025-6544); This vulnerability is a bypass of CVE-2025-6507. Due to the system’s flawed handling of JDBC connection parameters, an unauthenticated attacker can bypass existing regular expression checks through double URL encoding, thereby enabling arbitrary file reading and […]
H2O-3 JDBC Deserialization Vulnerability (CVE-2025-6507)
September 4, 2025
Overview Recently, NSFOCUS CERT detected that H2O-3 released a security update to fix the H2O-3 JDBC deserialization vulnerability (CVE-2025-6507); This vulnerability is a bypass of CVE-2024-45758 and CVE-2024-10553. Due to the deserialization flaw in the system’s JDBC connection processing logic, an unauthenticated attacker can bypass existing regular expression filtering by manipulating spaces between parameters, thereby […]
