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CVE-2025-15559

29
FAUCET Score

CVE-2025-15559 is a critical OS command injection vulnerability affecting NesterSoft WorkTime, allowing an unauthenticated attacker to execute arbitrary commands with SYSTEM privileges. The flaw resides in the server API's "guid" parameter when generating and downloading the WorkTime client. With a CVSS score of 9.8, this vulnerability poses a severe risk, enabling full server compromise and sensitive data manipulation due to its network-based attack vector and low complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 11.8.8CPE matchmatch criteria
cpe:2.3:a:nestersoft:worktime:*:*:*:*:cloud:*:*:*
<= 11.8.8CPE matchmatch criteria
cpe:2.3:a:nestersoft:worktime:*:*:*:*:on-premise:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 13th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

r.sec-consult.com / worktime
Third Party Advisory