NesterSoft WorkTime up to 11.8.8 API Endpoint os command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in NesterSoft WorkTime up to 11.8.8. This vulnerability affects unknown code of the component API Endpoint. The manipulation results in os command injection. This vulnerability is identified as CVE-2025-15559. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in NesterSoft WorkTime up to 11.8.8. It has been classified as very critical. Affected is some unknown functionality of the component API Endpoint. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released by Tobias Niemann. The advisory is available at r.sec-consult.com. This vulnerability is traded as CVE-2025-15559 since 02/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/03/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.8

VulDB Base Score: 9.8
VulDB Temp Score: 9.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 9.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/04/2026 CVE reserved
02/19/2026 +15 days Advisory disclosed
02/19/2026 +0 days VulDB entry created
03/03/2026 +12 days VulDB entry last update

Sourcesinfo

Advisory: r.sec-consult.com
Researcher: Tobias Niemann
Status: Not defined

CVE: CVE-2025-15559 (🔒)
GCVE (CVE): GCVE-0-2025-15559
GCVE (VulDB): GCVE-100-346866

Entryinfo

Created: 02/19/2026 12:32
Updated: 03/03/2026 19:07
Changes: 02/19/2026 12:32 (54), 03/03/2026 19:07 (10)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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