# CVE-2021-24021: Cross-site scripting in Fortinet FortiAnalyzer

> Remote authenticated attackers can execute stored cross-site scripting attacks via Logview column settings in FortiAnalyzer, potentially compromising user sessions.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:F/RL:X/RC:X`)
- **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:** 6 Oct 2021
- **Updated:** 25 Oct 2024
- **Also known as:** GHSA-v56v-j2pc-w577

## What is CVE-2021-24021?

CVE-2021-24021 is a medium-severity cross-site scripting vulnerability in Fortinet Fortianalyzer, published on 6 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An improper neutralization of input vulnerability [CWE-79] in FortiAnalyzer versions 6.4.3 and below, 6.2.7 and below and 6.0.10 and below may allow a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the column settings of Logview in FortiAnalyzer, should the attacker be able to obtain that POST request, via other, hypothetical attacks.

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

## Which versions are affected by CVE-2021-24021?

It affects 1 product.


Products: Fortinet Fortianalyzer.

## How do I fix CVE-2021-24021?

No fix has been published for CVE-2021-24021 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24021 being exploited?

There is no known exploitation of CVE-2021-24021 in the wild and no public exploit code.

## Other vulnerabilities in Fortinet Fortianalyzer

- [CVE-2026-24858](https://insights.sbomify.com/CVE-2026-24858/): Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel (critical 9.4, exploited in the wild)
- [CVE-2023-25610](https://insights.sbomify.com/CVE-2023-25610/): Memory corruption in FortiAnalyzer (critical 9.3)
- [CVE-2021-32603](https://insights.sbomify.com/CVE-2021-32603/): Server-side request forgery in Fortinet FortiAnalyzer, FortiManager (high 8.8)
- [CVE-2020-12817](https://insights.sbomify.com/CVE-2020-12817/): Cross-site scripting in Fortinet FortiAnalyzer (high 8.8)
- [CVE-2024-48886](https://insights.sbomify.com/CVE-2024-48886/): Auth bypass in FortiOS (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24021 and fix it if it is affected.

What it is: CVE-2021-24021 is a medium-severity cross-site scripting vulnerability in Fortinet Fortianalyzer, published on 6 Oct 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-2021-24021 in the wild and no public exploit code.

Affected product: Fortinet Fortianalyzer. 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-2021-24021/ (Markdown: https://insights.sbomify.com/CVE-2021-24021/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24021
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24021
- OSV: https://osv.dev/vulnerability/CVE-2021-24021

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24021/
Summaries are generated and may contain mistakes; the official description above is the record.