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secrisk

HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component, allowing attackers with normal user privileges to hit the /rule/add API and thereby achieve RCE and take over the server.

CVE-2025-63721 is a critical vulnerability affecting HummerRisk software versions through 1.5.0, caused by the inclusion of a vulnerable version of the Snakeyaml library. Snakeyaml is a YAML parser and emitter for Java, and this vulnerability relates to unsafe deserialization of YAML input, classified under CWE-502. Attackers with normal user privileges can send malicious payloads to the /rule/add API endpoint, which processes YAML data without proper validation or sanitization. This allows attackers to craft malicious YAML content that, when deserialized by the vulnerable Snakeyaml component, leads to remote code execution (RCE) on the server hosting HummerRisk. The attack requires no user interaction and no elevated privileges beyond normal user access, making exploitation straightforward if the API is reachable. The CVSS v3.1 base score of 9.8 reflects the high impact on confidentiality, integrity, and availability, as successful exploitation allows full server takeover. No patches or fixes are currently linked, increasing the urgency for defensive measures. Although no known exploits have been observed in the wild, the vulnerability's nature and ease of exploitation make it a critical threat. The vulnerability's root cause is unsafe deserialization, a common and dangerous flaw where untrusted input is deserialized without sufficient validation, enabling attackers to execute arbitrary code or commands on the target system.

Detailed information about CVE-2025-63721: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2025-63721: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-63721: n/a

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