# CVE-2021-33849: Cross-site scripting in Zoho CRM Lead Magnet

> Attackers can execute arbitrary JavaScript in users' browsers via XSS in the Zoho CRM Lead Magnet plugin when modifying or deleting forms.

- **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 Oct 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-jhx6-45qh-j9xp

## What is CVE-2021-33849?

CVE-2021-33849 is a medium-severity cross-site scripting vulnerability in Zoho CRM Lead Magnet, published on 5 Oct 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

A Cross-Site Scripting (XSS) attack can cause arbitrary code (JavaScript) to run in a user’s browser while the browser is connected to a trusted website. The attack targets your application's users and not the application itself while using your application as the attack's vehicle. The XSS payload executes whenever the user changes the form values or deletes a created form in Zoho CRM Lead Magnet Version 1.7.2.4.

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

## Which versions are affected by CVE-2021-33849?

It affects 1 product.


Products: Zohocorp Zoho Crm Lead Magnet.

## How do I fix CVE-2021-33849?

No fix has been published for CVE-2021-33849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33849 being exploited?

There is no known exploitation of CVE-2021-33849 in the wild and no public exploit code.

## Other vulnerabilities in Zoho CRM Lead Magnet

- [CVE-2022-41978](https://insights.sbomify.com/CVE-2022-41978/): WordPress Zoho CRM Lead Magnet plugin <= 1.7.5.8 - Auth. Arbitrary Options Update vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33849 and fix it if it is affected.

What it is: CVE-2021-33849 is a medium-severity cross-site scripting vulnerability in Zoho CRM Lead Magnet, published on 5 Oct 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-2021-33849 in the wild and no public exploit code.

Affected product: Zoho CRM Lead Magnet. 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-2021-33849/ (Markdown: https://insights.sbomify.com/CVE-2021-33849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33849
- OSV: https://osv.dev/vulnerability/CVE-2021-33849

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33849/
Summaries are generated and may contain mistakes; the official description above is the record.