# CVE-2021-25063: Contact Form 7 Skins < 2.5.1 - Reflected Cross-Site Scripting (XSS)

> Reflected XSS in Contact Form 7 Skins plugin allows attackers to execute arbitrary scripts in admin pages via the tab parameter.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 1 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-g78w-xr4j-vmwx

## What is CVE-2021-25063?

CVE-2021-25063 is a medium-severity cross-site scripting vulnerability in Unknown Skins for Contact Form 7, published on 1 Feb 2022. 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

The Skins for Contact Form 7 WordPress plugin before 2.5.1 does not sanitise and escape the tab parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting

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

## Which versions are affected by CVE-2021-25063?

It affects 1 product.


Products: Cf7skins Contact Form 7 Skins.

## How do I fix CVE-2021-25063?

No fix has been published for CVE-2021-25063 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25063 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25063 exists.

Public exploit code:

- WordPress Contact Form 7 Skins <=2.5.0 - Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-25063.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25063 and fix it if it is affected.

What it is: CVE-2021-25063 is a medium-severity cross-site scripting vulnerability in Unknown Skins for Contact Form 7, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25063 exists.

Affected product: Unknown Skins for Contact Form 7. 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-2021-25063/ (Markdown: https://insights.sbomify.com/CVE-2021-25063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25063
- OSV: https://osv.dev/vulnerability/CVE-2021-25063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25063/
Summaries are generated and may contain mistakes; the official description above is the record.