PT-2025-25343 · Vantage6 · Vantage6

Bartvanb · Published 2025-06-12 · Updated 2025-06-12 · CVE-2025-43866

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions vantage6 versions prior to 4.11.0

Description The vantage6 server has a predictable JWT secret key generation issue. The auto-generated key is a UUID1, which is not cryptographically secure as it is predictable to some extent. This issue affects the privacy-preserving analysis functionality of the vantage6 infrastructure.

Recommendations For versions prior to 4.11.0, update to version 4.11.0 to resolve the issue. As a temporary workaround, consider defining a custom JWT secret key to minimize the risk of exploitation.

Exploit

Fix

Use of Insufficiently Random Values

Weakness Enumeration

CWE-330

Related Identifiers

CVE-2025-43866

GHSA-M3MQ-F375-5VGH

PYSEC-2025-221

Affected Products

Vantage6

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/43xxx/CVE-2025-43866.json · Exploit
• https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-m3mq-f375-5vgh · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-43866 · Security Note
• https://osv.dev/vulnerability/PYSEC-2025-221 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-43866 · Vendor Advisory
• https://github.com/vantage6/vantage6 · Note
• https://github.com/vantage6/vantage6/commit/e39a262faf1cd4c554bf1b8e57eeea082da995c0 · Note
• https://t.me/cvetracker/26114 · Telegram Post
• https://t.me/cvenotify/125534 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1933232323350114418 · Twitter Post
• https://twitter.com/CVEnew/status/1933235323539988877 · Twitter Post