Nestersoft vulnerabilities
Published CVEs affecting Nestersoft products: 5 record(s), with severity, exploitation and fixes.
CVE-2025-15563
Medium · 5.3
CWE-862 Feb 19, 2026
Broken Access Control results in Denial of Service in NesterSoft WorkTime
Any unauthenticated user can reset the WorkTime on-prem database configuration by sending a specific HTTP request to the WorkTime server. No authorization check is applied here.
CVE-2025-15562
Medium · 6.1
CWE-79 Feb 19, 2026
Reflected Cross-Site Scripting in NesterSoft WorkTime
The server API endpoint /report/internet/urls reflects received data into the HTML response without applying proper encoding or filtering. This allows an attacker to execute arbitrary JavaScript in the victim's browser if the victim opens a URL prepared by the attacker.
CVE-2025-15561
High · 7.8
CWE-269 Feb 19, 2026
Local Privilege Escalation in NesterSoft WorkTime
An attacker can exploit the update behavior of the WorkTime monitoring daemon to elevate privileges on the local system to NT Authority\SYSTEM. A malicious executable must be named WTWatch.exe and dropped in the C:\ProgramData\wta\ClientExe directory, which is writable by "Everyone". The executable will then be run by the WorkTime monitoring daemon.
CVE-2025-15560
High · 8.8
CWE-89 Feb 19, 2026
SQL Injection in NesterSoft WorkTime
An authenticated attacker with minimal permissions can exploit a SQL injection in the WorkTime server "widget" API endpoint to inject SQL queries. If the Firebird backend is used, attackers are able to retrieve all data from the database backend. If the MSSQL backend is used the attacker can execute arbitrary SQL statements on the database backend and gain access to sensitive data.
CVE-2025-15559
Critical · 9.8
CWE-78 Feb 19, 2026
Unauthenticated OS Command Injection in NesterSoft WorkTime
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.