# CVE-2020-12512: Pepper+Fuchs Comtrol IO-Link Master Cross-Site Scripting

> An authenticated attacker can inject malicious scripts into the Pepperl+Fuchs Comtrol IO-Link Master web interface via reflected POST requests.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jan 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-6963-865c-fqm9

## What is CVE-2020-12512?

CVE-2020-12512 is a high-severity cross-site scripting vulnerability in Pepper+Fuchs Comtrol IO-Link Master, published on 22 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated reflected POST Cross-Site Scripting

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-12512?

It affects 12 products.


Products: Pepperl-Fuchs Io-Link Master 4-Eip Firmware, Pepperl-Fuchs Io-Link Master 4-Pnio Firmware, Pepperl-Fuchs Io-Link Master 8-Eip-L Firmware, Pepperl-Fuchs Io-Link Master 8-Eip Firmware, Pepperl-Fuchs Io-Link Master 8-Pnio-L Firmware, Pepperl-Fuchs Io-Link Master 8-Pnio Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip-P Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip-T Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Eip Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio-P Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio-T Firmware, Pepperl-Fuchs Io-Link Master Dr-8-Pnio Firmware.

## How do I fix CVE-2020-12512?

No fix has been published for CVE-2020-12512 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-12512 being exploited?

There is no known exploitation of CVE-2020-12512 in the wild and no public exploit code.

## Other vulnerabilities in Pepper+Fuchs Comtrol IO-Link Master

- [CVE-2020-12511](https://insights.sbomify.com/CVE-2020-12511/): Pepper+Fuchs Comtrol IO-Link Master Cross-Site Request Forgery (high 8.8)
- [CVE-2020-12513](https://insights.sbomify.com/CVE-2020-12513/): Pepper+Fuchs Comtrol IO-Link Master OS Command Injection (high 7.5)
- [CVE-2020-12514](https://insights.sbomify.com/CVE-2020-12514/): Pepper+Fuchs Comtrol IO-Link Master NULL Pointer Dereference (medium 6.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-12512 and fix it if it is affected.

What it is: CVE-2020-12512 is a high-severity cross-site scripting vulnerability in Pepper+Fuchs Comtrol IO-Link Master, published on 22 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-12512 in the wild and no public exploit code.

Affected product: Pepper+Fuchs Comtrol IO-Link Master. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-12512/ (Markdown: https://insights.sbomify.com/CVE-2020-12512/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-12512
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-12512
- OSV: https://osv.dev/vulnerability/CVE-2020-12512

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-12512/
Summaries are generated and may contain mistakes; the official description above is the record.