CVE-2025-15559
Last modified
CVE-2025-15559 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nestersoft | Worktime | <= 11.8.8 |
References
- https://r.sec-consult.com/worktimeThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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