CVE-2025-43863

Description

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct. This vulnerability is fixed in 4.11.

CVSS v3.1 Score

9.8

CRITICAL

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

Weakness Type (CWE)

CWE-307 CWE-307

Affected Products

Vendor	Product	Versions
vantage6	vantage6	< 4.11.0

References

Advisories & Patches

https://github.com/vantage6/vantage6/security/advisories/GHSA-j6g5-p62x-58hw

Frequently Asked Questions

What is CVE-2025-43863? +

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct. This vulnerability is fixed in 4.11. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-43863? +

CVE-2025-43863 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-43863? +

CVE-2025-43863 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-2025-43863? +

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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