CVE-2021-45036 json
Velneo vClient improper authentication
published 3y ago modified 4mo ago also EUVD-2021-31833
- cvss
- 8.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
Is CVE-2021-45036 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |
| NVD | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- Velneo Velneo vClient
Classification
References
-
velneo.com
/blog/disponible-la-nueva-version-velneo-32
release-notes, vendor-advisory
-
doc.velneo.com
/v/32/velneo/notas-de-la-version#mejoras-de-seguridad-en-validacion-de-usuario-y-contrasena
release-notes, vendor-advisory
-
velneo.es
/mivelneo/listado-de-cambios-velneo-32/
release-notes, vendor-advisory
-
doc.velneo.com
/v/32/velneo/notas-de-la-version#a-partir-de-esta-version-todos-los-servidores-arrancaran-con-protocolo-vatps
vendor-advisory
-
doc.velneo.com
/v/32/velneo-vserver/funcionalidades/protocolo-vatps
vendor-advisory
-
doc.velneo.com
/v/32/velneo/funcionalidades-comunes/conexion-con-velneo-vserver
vendor-advisory
- incibe.es /en/incibe-cert/notices/aviso/velneo-vclient-improper-authentication-0
Sources
- CVE List CVE-2021-45036
- NVD CVE-2021-45036
Fencer Intel 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.