# CVE-2022-4562: Meks Flexible Shortcodes < 1.3.5 - Contributor+ Stored XSS

> Contributors can inject malicious scripts via shortcode attributes, potentially compromising admin accounts in WordPress sites using this plugin.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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:** 13 Feb 2023
- **Updated:** 20 Mar 2025
- **Also known as:** GHSA-rcp4-35j5-3qcc

## What is CVE-2022-4562?

CVE-2022-4562 is a medium-severity cross-site scripting vulnerability in Unknown Meks Flexible Shortcodes, published on 13 Feb 2023. 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 Meks Flexible Shortcodes WordPress plugin before 1.3.5 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

## Which versions are affected by CVE-2022-4562?

It affects 1 product.


Products: Mekshq Meks Flexible Shortcodes.

## How do I fix CVE-2022-4562?

No fix has been published for CVE-2022-4562 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-4562 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4562 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-4562 and fix it if it is affected.

What it is: CVE-2022-4562 is a medium-severity cross-site scripting vulnerability in Unknown Meks Flexible Shortcodes, published on 13 Feb 2023. Any signed-in user can exploit it over the network, 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-2022-4562 exists.

Affected product: Unknown Meks Flexible Shortcodes. 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-2022-4562/ (Markdown: https://insights.sbomify.com/CVE-2022-4562/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-4562
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-4562
- OSV: https://osv.dev/vulnerability/CVE-2022-4562

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-4562/
Summaries are generated and may contain mistakes; the official description above is the record.