# CVE-2020-8340: Cross-site scripting in System x IMM2 firmware

> Cross-site scripting in IBM/Lenovo IMM2 firmware allows JavaScript execution in user browsers via crafted URLs, requiring user interaction and network knowledge.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Sep 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-6gmj-5hf7-3xr4

## What is CVE-2020-8340?

CVE-2020-8340 is a medium-severity cross-site scripting vulnerability in IBM System x IMM2 firmware, published on 15 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A cross-site scripting (XSS) vulnerability was discovered in the legacy IBM and Lenovo System x IMM2 (Integrated Management Module 2), prior to version 5.60, embedded Baseboard Management Controller (BMC) web interface during an internal security review. This vulnerability could allow JavaScript code to be executed in the user's web browser if the user is convinced to visit a crafted URL, possibly through phishing. Successful exploitation requires specific knowledge about the user’s network to be included in the crafted URL. Impact is limited to the normal access restrictions and permissions of the user clicking the crafted URL, and subject to the user being able to connect to and already being authenticated to IMM2 or other systems. The JavaScript code is not executed on IMM2 itself.

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

## Which versions are affected by CVE-2020-8340?

It affects 1 product.


Products: Lenovo Integrated Management Module 2.

## How do I fix CVE-2020-8340?

No fix has been published for CVE-2020-8340 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-8340 being exploited?

There is no known exploitation of CVE-2020-8340 in the wild and no public exploit code.

## Other vulnerabilities in IBM System x IMM2 firmware

- [CVE-2017-3774](https://insights.sbomify.com/CVE-2017-3774/): Memory corruption in IMM2 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8340 and fix it if it is affected.

What it is: CVE-2020-8340 is a medium-severity cross-site scripting vulnerability in IBM System x IMM2 firmware, published on 15 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-8340 in the wild and no public exploit code.

Affected product: IBM System x IMM2 firmware. 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-2020-8340/ (Markdown: https://insights.sbomify.com/CVE-2020-8340/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8340
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8340
- OSV: https://osv.dev/vulnerability/CVE-2020-8340

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-8340/
Summaries are generated and may contain mistakes; the official description above is the record.