# What is CVE-2022-22520?

> CVE-2022-22520 is a medium-severity flaw (CVSS 5.3) in Myrex24 from Helmholz, published on 14 September 2022. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 1.0%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2022-22520

## At a glance

- **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle.
- **Precursor Intelligence risk score:** 24 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 5.3 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 1.0% (latest exploit-likelihood forecast)
- **Published:** 14 September 2022
- **Record last updated:** 1 October 2022
- **Main product:** Myrex24 from Helmholz
- **Affected products:** 4

## What is CVE-2022-22520? In plain terms

It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data.

### The official 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.

### What kind of flaw is it?

- CWE-204: Observable Response Discrepancy

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Easy: no special conditions
- Login needed first: No login needed
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can read some data

Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`

## Is CVE-2022-22520 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 1.0%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 1.0%, 1.0%, 1.0%, 1.0%, 1.0%, 1.0%, 1.0%.

### Timeline

- 14 September 2022: Published
- 1 October 2022: Record last updated

### How Precursor Intelligence ranks it

CVE-2022-22520 scores **24 out of 100 (Low)**, with the action "Monitor".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2022-22520?

The published record lists 4 products.

- [Myrex24](https://www.precursorintelligence.com/product/helmholz/myrex24) by [Helmholz](https://www.precursorintelligence.com/vendors/helmholz) (Application): up to 2.11.2
- [Mbconnect24](https://www.precursorintelligence.com/product/mbconnectline/mbconnect24) by [Mbconnectline](https://www.precursorintelligence.com/vendors/mbconnectline) (Application): up to 2.11.2
- [Mymbconnect24](https://www.precursorintelligence.com/product/mbconnectline/mymbconnect24) by [Mbconnectline](https://www.precursorintelligence.com/vendors/mbconnectline) (Application): up to 2.11.2
- [Myrex24.virtual](https://www.precursorintelligence.com/product/helmholz/myrex24.virtual) by [Helmholz](https://www.precursorintelligence.com/vendors/helmholz) (Application): up to 2.11.2

## How do I fix CVE-2022-22520?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [cert.vde.com](https://cert.vde.com/en/advisories/VDE-2022-011) (Third-party advisory, Vulnerability database)
- [cert.vde.com](https://cert.vde.com/en/advisories/VDE-2022-039) (Not applicable)

## Questions

### What is CVE-2022-22520?

CVE-2022-22520 is a medium-severity flaw in Myrex24 from Helmholz, published on 14 September 2022. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data.

### How serious is CVE-2022-22520?

It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2022-22520 is 24 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2022-22520 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 1.0%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2022-22520 affect?

For Myrex24 from Helmholz: up to 2.11.2. The record lists 4 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2022-22520?

Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2022-22520 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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