CVE-2021-34575: Information Exposure in mymbCONNECT24, mbCONNECT24 <= 2.8.0

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-02 · updated 2026-06-17
Weakness: CWE-203

Description

In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.

Affected products

MB connect line mbCONNECT24: through 2.8.0
MB connect line mymbCONNECT24: through 2.8.0

References

https://cert.vde.com/de-de/advisories/vde-2021-030
https://cert.vde.com/de-de/advisories/vde-2021-030

Get alerted when CVE-2021-34575 or the next vulnerability affects your stack