# CVE-2021-31834: McAfee ePO Cross-Site Scripting vulnerability

> Administrators can inject arbitrary scripts into McAfee ePO, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 22 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-xqx4-9mw7-3chj

## What is CVE-2021-31834?

CVE-2021-31834 is a medium-severity cross-site scripting vulnerability in Mcafee Epolicy Orchestrator, published on 22 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Stored Cross-Site Scripting vulnerability in McAfee ePolicy Orchestrator (ePO) prior to 5.10 Update 11 allows ePO administrators to inject arbitrary web script or HTML via multiple parameters where the administrator's entries were not correctly sanitized.

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

## Which versions are affected by CVE-2021-31834?

It affects 1 product.


Products: Mcafee Epolicy Orchestrator.

## How do I fix CVE-2021-31834?

No fix has been published for CVE-2021-31834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-31834 being exploited?

There is no known exploitation of CVE-2021-31834 in the wild and no public exploit code.

## Other vulnerabilities in Mcafee Epolicy Orchestrator

- [CVE-2016-8027](https://insights.sbomify.com/CVE-2016-8027/): SQL injection in McAfee ePolicy Orchestrator (ePO) 5.3.2 and earlier and 5.1.3 and earlier (critical 10.0)
- [CVE-2006-5156](https://insights.sbomify.com/CVE-2006-5156/): Memory corruption in n/a (critical 10.0)
- [CVE-2002-0690](https://insights.sbomify.com/CVE-2002-0690/): Code injection in n/a (critical 10.0)
- [CVE-2007-1498](https://insights.sbomify.com/CVE-2007-1498/): Memory corruption in n/a (critical 9.3)
- [CVE-2015-8765](https://insights.sbomify.com/CVE-2015-8765/): Deserialization in n/a (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-31834 and fix it if it is affected.

What it is: CVE-2021-31834 is a medium-severity cross-site scripting vulnerability in Mcafee Epolicy Orchestrator, published on 22 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-31834 in the wild and no public exploit code.

Affected product: Mcafee Epolicy Orchestrator. 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-2021-31834/ (Markdown: https://insights.sbomify.com/CVE-2021-31834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-31834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-31834
- OSV: https://osv.dev/vulnerability/CVE-2021-31834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-31834/
Summaries are generated and may contain mistakes; the official description above is the record.