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CVE-2025-43863

24
FAUCET Score

CVE-2025-43863 is a critical vulnerability affecting vantage6, an open-source framework for privacy-enhancing technologies. An authenticated attacker can exploit a flaw in the change password functionality to brute-force user passwords indefinitely, as the system continuously indicates incorrect attempts without lockout. With a CVSS score of 9.8, this vulnerability poses a high risk of complete compromise (confidentiality, integrity, and availability) due to its network-based attack vector and low attack complexity. While no active exploitation or public exploit code is currently reported, and community discussion is minimal, the high FAUCET Risk Score of 87/100 indicates its significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.11.0CPE matchmatch criteria
cpe:2.3:a:vantage6:vantage6:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

1.7LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
LOW
VS Integrity
LOW
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
UNREPORTED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 10th percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

pippatch availablevia ghsa
Product: vantage6Fixed in: 4.11.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

pipGHSA-j6g5-p62x-58hwlow

vantage6 lacks brute-force protection on change password functionality

Jun 12, 2025

References

github.com / vantage6/vantage6/security/advisories/GHSA-j6g5-p62x-58hw
Vendor Advisory