CVE-2025-43866: vantage6 — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-330 CWE-330

Affected Products

Vendor	Product	Versions
vantage6	vantage6	< 4.11.0

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-43866? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-43866? +

CVE-2025-43866 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-43866? +

CVE-2025-43866 affects products from vantage6, specifically: vantage6. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-43866? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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