CVE-2025-43866

Name: CVE-2025-43866
Creator: NVD / NIST
Published: 2025-06-12T18:15:20.713+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.7/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2025-43866 is a low-severity vulnerability rated 1.7/10 on the CVSS scale. vantage6 is an open-source infrastructure for privacy preserving analysis. The JWT secret key in the vantage6 server is auto-generated unless defined by the user. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

vantage6 is an open-source infrastructure for privacy preserving analysis. The JWT secret key in the vantage6 server is auto-generated unless defined by the user. The auto-generated key is a UUID1, which is not cryptographically secure as it is predictable to some extent. This vulnerability is fixed in 4.11.0.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

1.7/10

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.33%

24.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-330

Affected Software

Vendor	Product	Versions
Vantage6	Vantage6	< 4.11.0

References

https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vghVendor Advisory

Timeline

Published: Jun 12, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-43866?

How severe is CVE-2025-43866?

CVE-2025-43866 has a CVSS score of 1.7/10 (LOW severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2025-43866?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-43866?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST