# CVE-2021-36913: Redirection for Contact Form 7 <= 2.4.0 - Unauthenticated Options Change and Content Injection vulnerability

> Unauthenticated attackers can inject scripts into the footer HTML and change options if the AccessiBe extension is active.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Oct 2022
- **Updated:** 28 Apr 2026
- **Also known as:** GHSA-7fvf-jrqc-p27w

## What is CVE-2021-36913?

CVE-2021-36913 is a high-severity cross-site scripting vulnerability in Qube One Redirection for Contact Form 7 (WordPress plugin), published on 11 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unauthenticated Options Change and Content Injection vulnerability in Qube One Redirection for Contact Form 7 plugin <= 2.4.0 at WordPress allows attackers to change options and inject scripts into the footer HTML. Requires an additional extension (plugin) AccessiBe.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2021-36913?

It affects 1 product.


Products: Redirection-for-Contact-Form7 Redirection for Contact Form 7.

## How do I fix CVE-2021-36913?

No fix has been published for CVE-2021-36913 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36913 being exploited?

There is no known exploitation of CVE-2021-36913 in the wild and no public exploit code.

## Other vulnerabilities in Qube One Redirection for Contact Form 7 (WordPress plugin)

- [CVE-2022-0250](https://insights.sbomify.com/CVE-2022-0250/): Redirection for Contact Form 7 < 2.5.0 - Reflected Cross-Site Scripting (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-36913 and fix it if it is affected.

What it is: CVE-2021-36913 is a high-severity cross-site scripting vulnerability in Qube One Redirection for Contact Form 7 (WordPress plugin), published on 11 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-36913 in the wild and no public exploit code.

Affected product: Qube One Redirection for Contact Form 7 (WordPress plugin). 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-2021-36913/ (Markdown: https://insights.sbomify.com/CVE-2021-36913/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36913
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36913
- OSV: https://osv.dev/vulnerability/CVE-2021-36913

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-36913/
Summaries are generated and may contain mistakes; the official description above is the record.