# CVE-2021-24134: Constant Contact Forms < 1.8.8 - Multiple Authenticated Stored XSS

> High-privileged users can inject arbitrary JavaScript into posts via the Constant Contact Forms plugin, potentially compromising site integrity.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-5gq5-98jg-gqqf

## What is CVE-2021-24134?

CVE-2021-24134 is a medium-severity cross-site scripting vulnerability in Unknown Constant Contact Forms, published on 18 Mar 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Unvalidated input and lack of output encoding in the Constant Contact Forms WordPress plugin, versions before 1.8.8, lead to multiple Stored Cross-Site Scripting vulnerabilities, which allowed high-privileged user (Editor+) to inject arbitrary JavaScript code or HTML in posts where the malicious form is embed.

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

## Which versions are affected by CVE-2021-24134?

It affects 1 product.


Products: Constantcontact Constant Contact Forms.

## How do I fix CVE-2021-24134?

No fix has been published for CVE-2021-24134 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24134 being exploited?

There is no known exploitation of CVE-2021-24134 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Constant Contact Forms

- [CVE-2023-52208](https://insights.sbomify.com/CVE-2023-52208/): WordPress Constant Contact Forms Plugin <= 2.4.2 is vulnerable to Sensitive Data Exposure (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24134 and fix it if it is affected.

What it is: CVE-2021-24134 is a medium-severity cross-site scripting vulnerability in Unknown Constant Contact Forms, published on 18 Mar 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-24134 in the wild and no public exploit code.

Affected product: Unknown Constant Contact Forms. 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-2021-24134/ (Markdown: https://insights.sbomify.com/CVE-2021-24134/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24134
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24134
- OSV: https://osv.dev/vulnerability/CVE-2021-24134

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24134/
Summaries are generated and may contain mistakes; the official description above is the record.