# CVE-2021-24834: YOP Poll < 6.3.1 - Author+ Stored Cross-Site Scripting via Options Module

> An author-level user can inject arbitrary scripts via poll options, leading to stored XSS in the YOP Poll WordPress plugin.

- **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 Nov 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4rg7-7m6h-7jqr

## What is CVE-2021-24834?

CVE-2021-24834 is a medium-severity cross-site scripting vulnerability in Unknown YOP Poll, published on 17 Nov 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 YOP Poll WordPress plugin before 6.3.1 is affected by a stored Cross-Site Scripting vulnerability which exists in the Create Poll - Options module where a user with a role as low as author is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of custom label parameters - vote button label , results link label and back to vote caption label.

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

## Which versions are affected by CVE-2021-24834?

It affects 1 product.


Products: Yop-Poll Yop Poll.

## How do I fix CVE-2021-24834?

No fix has been published for CVE-2021-24834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24834 being exploited?

There is no known exploitation of CVE-2021-24834 in the wild and no public exploit code.

## Other vulnerabilities in Unknown YOP Poll

- [CVE-2021-24454](https://insights.sbomify.com/CVE-2021-24454/): YOP Poll < 6.2.8 - Stored Cross-Site Scripting (medium 6.1)
- [CVE-2021-24833](https://insights.sbomify.com/CVE-2021-24833/): YOP Poll < 6.3.1 - Author+ Stored Cross-Site Scripting via Preview Module (medium 5.4)
- [CVE-2017-2127](https://insights.sbomify.com/CVE-2017-2127/): Cross-site scripting in YOP Poll (medium 5.4)
- [CVE-2023-6109](https://insights.sbomify.com/CVE-2023-6109/): YOP Poll <= 6.5.26 - Race Condition to Vote Manipulation (medium 5.3)
- [CVE-2022-1600](https://insights.sbomify.com/CVE-2022-1600/): YOP Poll < 6.4.3 - IP Spoofing (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24834 and fix it if it is affected.

What it is: CVE-2021-24834 is a medium-severity cross-site scripting vulnerability in Unknown YOP Poll, published on 17 Nov 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-2021-24834 in the wild and no public exploit code.

Affected product: Unknown YOP Poll. 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-2021-24834/ (Markdown: https://insights.sbomify.com/CVE-2021-24834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24834
- OSV: https://osv.dev/vulnerability/CVE-2021-24834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24834/
Summaries are generated and may contain mistakes; the official description above is the record.