Vulnerability Details CVE-2025-15559
An unauthenticated attacker can inject OS commands when calling a server API endpoint in NesterSoft WorkTime. The server API call to generate and download the WorkTime client from the WorkTime server is vulnerable in the “guid” parameter. This allows an attacker to execute arbitrary commands on the WorkTime server as NT Authority\SYSTEM with the highest privileges. Attackers are able to access or manipulate sensitive data and take over the whole server.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 36.2%
CVSS Severity
CVSS v3 Score 9.8
References
Products affected by CVE-2025-15559
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cpe:2.3:a:nestersoft:worktime:*