VulnerabilityPublished 19 Feb 2026Updated 20 Feb 2026

CVE-2025-15563: NesterSoft WorkTime (on-prem/cloud) · Missing Authorization

Affects NesterSoft WorkTime (on-prem/cloud)Source CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
NesterSoft Inc.WorkTime (on-prem/cloud)	Affected <=11.8.8	Fixed in–

AI-suggested

Network Segmentation: Restrict access to the WorkTime server, especially the HTTP interface, to trusted internal networks or VPN users only, minimizing exposure to unauthenticated attackers.
Web Application Firewall (WAF): Deploy a WAF with custom rules to detect and block suspicious HTTP requests attempting to reset configurations.
Monitoring and Logging: Enable detailed logging of HTTP requests to the WorkTime server and monitor for unusual or unauthorized configuration reset attempts.
Access Controls: Implement strict network-level access controls and consider additional authentication proxies in front of the WorkTime server to enforce authorization.
Vendor Coordination: Engage with NesterSoft Inc. for official patches or updates addressing this vulnerability and apply them promptly once available.
Incident Response Preparation: Prepare response plans to quickly restore configurations and services if exploitation occurs.
Configuration Backups: Regularly back up WorkTime configuration data to enable rapid restoration after an unauthorized reset.
Security Testing: Conduct penetration testing and vulnerability assessments to identify and remediate similar authorization issues in other components.

Description

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.

Impact

The primary impact of CVE-2025-15563 is operational disruption. An attacker can reset the WorkTime on-premises database configuration remotely without authentication, potentially causing loss of customized settings, interruption of time tracking services, and administrative overhead to restore proper configurations. While the vulnerability does not directly expose sensitive data or allow modification of data integrity, the forced reset could indirectly affect business processes relying on accurate time tracking and reporting. Organizations may experience downtime or degraded service quality, impacting productivity and possibly compliance with labor regulations. Additionally, the vulnerability could be exploited as a stepping stone in a multi-stage attack if combined with other vulnerabilities or misconfigurations. The lack of authentication and ease of exploitation increase the risk, especially in environments where the WorkTime server is exposed to untrusted networks. However, the absence of known exploits in the wild suggests limited active exploitation currently, though this could change if attackers develop automated tools.

CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Architecture and Design
Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries.
Architecture and Design
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
Attack patterns
Exploitation of Thunderbolt Protection Flaws (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

r.sec-consult.com/worktime (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Feb 2026, 14:11 UTC

WeaknessesCWE-862

Technical details

References

Community reviews

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