CVE-2025-43863 json
vantage6 lacks brute-force protection on change password functionality
published 2025-06-12 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-18202 , GHSA-j6g5-p62x-58hw , PYSEC-2025-220
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 16 mo ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 1.7 | 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 |
| CNA | 4.0 | 1.7 | 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 |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | vantage6 | <4.11.0 |
4.11.0 |
Affected products
- vantage6 vantage6
Classification
- Weakness
-
- CWE-307 Improper Restriction of Excessive Authentication Attempts
References
-
github.com
/vantage6/vantage6/commit/e0f1841b310f6f610e8137db2506cf683ce154d0
web
-
github.com
/vantage6/vantage6/security/advisories/GHSA-j6g5-p62x-58hw
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-43863
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/vantage6/PYSEC-2025-220.yaml
web
-
github.com
/vantage6/vantage6
package
Sources
- CVE List CVE-2025-43863
- GitHub Advisory GHSA-j6g5-p62x-58hw
- NVD CVE-2025-43863
- OSV PYSEC-2025-220
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.