# CVE-2021-20392: Cross-site scripting in QRadar SIEM

> Attackers can inject JavaScript into the Web UI to steal credentials from trusted sessions in IBM QRadar User Behavior Analytics.

- **Severity:** Medium 6.1 (`CVSS:3.0/I:L/AC:L/UI:R/PR:N/S:C/AV:N/C:L/A:N/RL:O/E:H/RC:C`)
- **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:** 14 May 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-fvm4-pf5q-h76x

## What is CVE-2021-20392?

CVE-2021-20392 is a medium-severity cross-site scripting vulnerability in IBM QRadar SIEM, published on 14 May 2021. 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

IBM QRadar User Behavior Analytics 1.0.0 through 4.0.1 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

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

## Which versions are affected by CVE-2021-20392?

It affects 1 product.


Products: Ibm Qradar User Behavior Analytics.

## How do I fix CVE-2021-20392?

No fix has been published for CVE-2021-20392 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20392 being exploited?

There is no known exploitation of CVE-2021-20392 in the wild and no public exploit code.

## Other vulnerabilities in IBM QRadar SIEM

- [CVE-2021-20393](https://insights.sbomify.com/CVE-2021-20393/): Information disclosure in QRadar SIEM (medium 5.3)
- [CVE-2022-36771](https://insights.sbomify.com/CVE-2022-36771/): Information disclosure in QRadar User Behavior Analytics (medium 4.3)
- [CVE-2021-29757](https://insights.sbomify.com/CVE-2021-29757/): Cross-site request forgery in QRadar User Behavior Analytics (medium 4.3)
- [CVE-2021-20391](https://insights.sbomify.com/CVE-2021-20391/): Information disclosure in QRadar SIEM (medium 4.0)
- [CVE-2021-20429](https://insights.sbomify.com/CVE-2021-20429/): Information disclosure in QRadar SIEM (low 3.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20392 and fix it if it is affected.

What it is: CVE-2021-20392 is a medium-severity cross-site scripting vulnerability in IBM QRadar SIEM, published on 14 May 2021. 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-2021-20392 in the wild and no public exploit code.

Affected product: IBM QRadar SIEM. 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-2021-20392/ (Markdown: https://insights.sbomify.com/CVE-2021-20392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20392
- OSV: https://osv.dev/vulnerability/CVE-2021-20392

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-20392/
Summaries are generated and may contain mistakes; the official description above is the record.