User enumeration vulnerability in MB connect line and Helmholz products

published 2022-09-14 4y ago modified 2026-06-17 4mo ago also EUVD-2022-27666

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

A remote, unauthenticated attacker can enumerate valid users by sending specific requests to the webservice of MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2.

Is CVE-2022-22520 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 Fencer

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

MB connect line mymbCONNECT24
MB connect line mbCONNECT24
Helmholz myREX24
Helmholz myREX24.virtual

Classification

Weakness

CWE-204 Observable Response Discrepancy

References

cert.vde.com /en/advisories/VDE-2022-039
not-applicable
cert.vde.com /en/advisories/VDE-2022-011
third-party-advisory, vdb-entry

Sources

CVE List CVE-2022-22520
NVD CVE-2022-22520

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.