Medium severity · published Sep 14, 2022
CVE-2022-22520
User enumeration vulnerability in MB connect line and Helmholz products
5.3
CVSS
1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MB
mbCONNECT24 · MB connect line
2 through 2.11.2 · source: vendor, NVD
MY
myREX24 · Helmholz
2 through 2.11.2 · source: vendor, NVD
MY
myREX24.virtual · Helmholz
2 through 2.11.2 · source: vendor, NVD
MY
mymbCONNECT24 · MB connect line
2 through 2.11.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-22520
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-22520
Third Party Advisory
https://cert.vde.com/en/advisories/VDE-2022-011
Not Applicable
https://cert.vde.com/en/advisories/VDE-2022-039
More from myREX24
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CVE-2023-0985
Helmholz and MB Connect Line: Account takeover via password reset in multiple products
8.2
CVE-2025-3090
MB connect line: Missing Authentication in mbCONNECT24/mymbCONNECT24
7.5
CVE-2025-3092
MB connect line: Observable response discrepancy in mbCONNECT24/mymbCONNECT24
7.5
CVE-2025-3091
MB connect line: Authorization bypass in mbCONNECT24/mymbCONNECT24
7.5
CVE-2020-35558
An issue was discovered in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual through 2.11.2