# CVE-2021-24157: Orbit Fox by ThemeIsle < 2.10.3 - Authenticated Stored Cross Site Scripting

> Authenticated users can inject malicious scripts into page headers or footers due to missing capability checks, 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:** 5 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-7gpg-h2jg-p789

## What is CVE-2021-24157?

CVE-2021-24157 is a medium-severity cross-site scripting vulnerability in Unknown Orbit Fox by ThemeIsle, published on 5 Apr 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

Orbit Fox by ThemeIsle has a feature to add custom scripts to the header and footer of a page or post. There were no checks to verify that a user had the unfiltered_html capability prior to saving the script tags, thus allowing lower-level users to inject scripts that could potentially be malicious.

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

## Which versions are affected by CVE-2021-24157?

It affects 1 product.


Products: Themeisle Orbit Fox.

## How do I fix CVE-2021-24157?

No fix has been published for CVE-2021-24157 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24157 being exploited?

There is no known exploitation of CVE-2021-24157 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Orbit Fox by ThemeIsle

- [CVE-2025-22659](https://insights.sbomify.com/CVE-2025-22659/): WordPress Orbit Fox by ThemeIsle plugin <= 2.10.44 - Cross Site Scripting (XSS) vulnerability (medium 6.5)
- [CVE-2021-24158](https://insights.sbomify.com/CVE-2021-24158/): Orbit Fox by ThemeIsle < 2.10.3 - Authenticated Privilege Escalation (medium 6.5)
- [CVE-2024-13183](https://insights.sbomify.com/CVE-2024-13183/): Orbit Fox by ThemeIsle <= 2.10.43 - Authenticated (Contributor+) Stored Cross-Site Scripting via title_tag Parameter (medium 6.4)
- [CVE-2025-0311](https://insights.sbomify.com/CVE-2025-0311/): Orbit Fox by ThemeIsle <= 2.10.43 - Authenticated (Contributor+) Stored Cross-Site Scripting via Pricing Table Widget (medium 6.4)
- [CVE-2024-7778](https://insights.sbomify.com/CVE-2024-7778/): Orbit Fox by ThemeIsle <= 2.10.36 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24157 and fix it if it is affected.

What it is: CVE-2021-24157 is a medium-severity cross-site scripting vulnerability in Unknown Orbit Fox by ThemeIsle, published on 5 Apr 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-2021-24157 in the wild and no public exploit code.

Affected product: Unknown Orbit Fox by ThemeIsle. 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-2021-24157/ (Markdown: https://insights.sbomify.com/CVE-2021-24157/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24157
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24157
- OSV: https://osv.dev/vulnerability/CVE-2021-24157

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24157/
Summaries are generated and may contain mistakes; the official description above is the record.