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CVE-2025-15559— Unauthenticated OS Command Injection in NesterSoft WorkTime

Quick assessment

Affected
NesterSoft Inc. WorkTime (on-prem/cloud)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NesterSoft WorkTime是加拿大NesterSoft公司的一个项目跟踪软件。 NesterSoft WorkTime存在安全漏洞，该漏洞源于服务器API端点guid参数存在OS命令注入，可能导致执行任意命令。

AI Predicted 10.0 Difficulty: Easy EPSS 0.44% · P37
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I. Basic Information for CVE-2025-15559

Vulnerability Information
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Vulnerability Title
Unauthenticated OS Command Injection in NesterSoft WorkTime
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
NesterSoft WorkTime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NesterSoft WorkTime是加拿大NesterSoft公司的一个项目跟踪软件。 NesterSoft WorkTime存在安全漏洞，该漏洞源于服务器API端点guid参数存在OS命令注入，可能导致执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NesterSoft Inc. WorkTime (on-prem/cloud) <= 11.8.8 -

II. Public POCs for CVE-2025-15559

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III. Intelligence Information for CVE-2025-15559

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Vendor Advisories for CVE-2025-15559 (1)

Same Patch Batch · NesterSoft Inc. · 2026-02-19 · 5 CVEs total

CVE-2025-15562 Reflected Cross-Site Scripting in NesterSoft WorkTime
CVE-2025-15561 Local Privilege Escalation in NesterSoft WorkTime
CVE-2025-15563 Broken Access Control results in Denial of Service in NesterSoft WorkTime
CVE-2025-15560 SQL Injection in NesterSoft WorkTime

IV. Related Vulnerabilities

Same product: WorkTime (on-prem/cloud)
Same vendor: NesterSoft Inc.
Same weakness: CWE-78

V. Comments for CVE-2025-15559

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