CVE-2025-3091 json
MB connect line: Authorization bypass in mbCONNECT24/mymbCONNECT24
published last yr. modified 4mo ago also EUVD-2025-19010
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
An low privileged remote attacker in possession of the second factor for another user can login as that user without knowledge of the other user`s password.
Patch / fix
- MB connect line mbCONNECT24 2.16.5
- MB connect line mymbCONNECT24 2.16.5, 2.18.0
- Helmholz myREX24 2.16.5, 2.18.0
- Helmholz myREX24.virtual 2.16.5, 2.18.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- MB connect line mbCONNECT24
- MB connect line mymbCONNECT24
- Helmholz myREX24
- Helmholz myREX24.virtual
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
Sources
- CVE List CVE-2025-3091
- NVD CVE-2025-3091
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.