Vulnerability · Published Jun 24, 2025 · Assigned by CERTVDE
CVE-2025-3091MB connect line: Authorization bypass in mbCONNECT24/mymbCONNECT24
High 7.5
In plain English
A high-severity authorization bypass via user-controlled key in myREX24 from Helmholz. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 68.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MB connect line | mbCONNECT24 | 0 – before 2.16.5 |
| MB connect line | mymbCONNECT24 | 0 – before 2.18.0 |
| MB connect line | mymbCONNECT24 | 0 – before 2.18.0 |
| MB connect line | mymbCONNECT24 | 0 – before 2.16.5 |
| Helmholz | myREX24 | 0 – before 2.18.0 |
| Helmholz | myREX24 | 0 – before 2.16.5 |
| Helmholz | myREX24.virtual | 0 – before 2.18.0 |
| Helmholz | myREX24.virtual | 0 – before 2.16.5 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H