# CVE-2021-24326: All 404 Redirect to Homepage < 1.21 - Authenticated Reflected Cross-Site Scripting (XSS)

> Authenticated attackers can execute arbitrary scripts via the tab parameter in the All 404 Redirect to Homepage plugin settings page.

- **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:** 17 May 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-8fv5-7m8g-42cx

## What is CVE-2021-24326?

CVE-2021-24326 is a medium-severity cross-site scripting vulnerability in Unknown All 404 Redirect to Homepage, published on 17 May 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

The tab parameter of the settings page of the All 404 Redirect to Homepage WordPress plugin before 1.21 was vulnerable to an authenticated reflected Cross-Site Scripting (XSS) issue as user input was not properly sanitised before being output in an attribute.

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

## Which versions are affected by CVE-2021-24326?

It affects 1 product.


Products: Clogica All 404 Redirect to Homepage.

## How do I fix CVE-2021-24326?

No fix has been published for CVE-2021-24326 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24326 being exploited?

There is no known exploitation of CVE-2021-24326 in the wild and no public exploit code.

## Other vulnerabilities in Unknown All 404 Redirect to Homepage

- [CVE-2021-24324](https://insights.sbomify.com/CVE-2021-24324/): 404 SEO Redirection <= 1.3 - CSRF to Stored Cross-Site Scripting (XSS) (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24326 and fix it if it is affected.

What it is: CVE-2021-24326 is a medium-severity cross-site scripting vulnerability in Unknown All 404 Redirect to Homepage, published on 17 May 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-2021-24326 in the wild and no public exploit code.

Affected product: Unknown All 404 Redirect to Homepage. 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-2021-24326/ (Markdown: https://insights.sbomify.com/CVE-2021-24326/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24326
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24326
- OSV: https://osv.dev/vulnerability/CVE-2021-24326

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24326/
Summaries are generated and may contain mistakes; the official description above is the record.