SSRF in variuos products of MB connect line and Helmholz

published 2021-02-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23228

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

An issue was discovered MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2. There is an SSRF in the HA module allowing an unauthenticated attacker to scan for open ports.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-061-03 updated 2021-03-02 cvss 5.8

MB connect line mbCONNECT24, mymbCONNECT24

MB connect line mymbCONNECT24 <= 2.6.1
affected: fixed in 2.71, mitigation “CVE-2020-35561: Avoid vulnerable open ports on the LAN side of the server by using a firewall solution” cve.org

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

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
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-918 Server-Side Request Forgery

References

mbconnectline.com /security-advice/
vendor-advisory
cert.vde.com /en/advisories/VDE-2021-003
third-party-advisory
cert.vde.com /en/advisories/VDE-2022-039
third-party-advisory

Sources

CVE List CVE-2020-35561
NVD CVE-2020-35561

Fencer Vulns 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.

Summary