CVE-2022-22520
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a user enumeration vulnerability in the webservice component of MB connect line products (mymbCONNECT24, mbCONNECT24, Helmholz myREX24, myREX24.virtual). A remote, unauthenticated attacker can determine whether specific usernames are valid by sending particular requests to the webservice, leaking information that aids subsequent attacks.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2.11.2<= 2.11.2<= 2.11.2<= 2.11.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if affected mb connect line product is runningDetermine if one of the following products is installed and running: mbCONNECT24, mymbCONNECT24, Helmholz myREX24, or myREX24.virtual. Check running services or installed applications on the system.Affected if Any of these products are running on the system
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Check installed product versionLocate and inspect the product's version information. This is typically accessible through the web interface login page, the product's administrative console, or the installed software package metadata.Affected if The installed version is 2.11.2 or lower
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Verify webservice component is accessibleDetermine if the webservice component is network-accessible. Check firewall rules, network configuration, and whether the webservice port (commonly 443 or 8080) is exposed to untrusted networks.Affected if The webservice is accessible from the network and responds to HTTP/HTTPS requests
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Test for user enumeration behaviorSend two different authentication requests to the webservice endpoint: one with a known-valid username and another with a random invalid username. Compare the response messages, timing, or HTTP status codes for differences that reveal whether a username exists.Affected if The responses differ between valid and invalid usernames, leaking information about which usernames are valid in the system
A user is affected if an mbCONNECT24, mymbCONNECT24, myREX24, or myREX24.virtual product version 2.11.2 or lower is running with an accessible webservice that reveals username validity through different responses.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate to a version beyond v2.11.2 or apply vendor-provided patches to fix the user enumeration behavior in the webservice.
- Consultation2.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-22520 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-22520 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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