HOMEVULNERABILITIESCVE-2025-43866
HIGH

CVE-2025-43866

CWE-330Published: June 12, 2025· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-43866 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

vantage61 product(s)
vantage6
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (1)

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

Quick Facts

CVE IDCVE-2025-43866
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-330
CISA KEVNo
Affected1 vendor(s)
PublishedJun 12, 2025

Related CVEs (CWE-330)

CVE-2020-27743
9.8
CVE-2020-35926
9.8
CVE-2019-2317
9.8
CVE-2020-9502
9.8
CVE-2020-7548
9.8
CVE-2021-27200
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-43866 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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