# CVE-2023-4820: PowerPress Podcasting < 11.0.12 - Contributor+ Stored XSS

> Contributors can inject arbitrary web scripts via the media URL field, potentially targeting site administrators.

- **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:** 16 Oct 2023
- **Updated:** 5 Mar 2025
- **Also known as:** GHSA-hfr4-7364-jv2q

## What is CVE-2023-4820?

CVE-2023-4820 is a medium-severity cross-site scripting vulnerability in Unknown PowerPress Podcasting plugin by Blubrry, published on 16 Oct 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 PowerPress Podcasting plugin by Blubrry WordPress plugin before 11.0.12 does not sanitize and escape the media url field in posts, which could allow users with privileges as low as contributor to inject arbitrary web scripts that could target a site admin or superadmin.

## Which versions are affected by CVE-2023-4820?

It affects 1 product.


Products: Blubrry Powerpress.

## How do I fix CVE-2023-4820?

No fix has been published for CVE-2023-4820 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4820 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4820 exists.

## Other vulnerabilities in Unknown PowerPress Podcasting plugin by Blubrry

- [CVE-2021-24123](https://insights.sbomify.com/CVE-2021-24123/): PowerPress < 8.3.8 - Authenticated Arbitrary File Upload leading to RCE (high 7.2)
- [CVE-2023-41239](https://insights.sbomify.com/CVE-2023-41239/): WordPress PowerPress Podcasting Plugin <= 11.0.6 is vulnerable to Server Side Request Forgery (SSRF) (medium 6.4)
- [CVE-2024-9230](https://insights.sbomify.com/CVE-2024-9230/): PowerPress Podcasting < 11.9.18 - Author+ XSS via Podcast URL (medium 5.9)
- [CVE-2023-30778](https://insights.sbomify.com/CVE-2023-30778/): WordPress PowerPress Podcasting Plugin <= 10.0.1 is vulnerable to Cross Site Scripting (XSS) (medium 5.5)
- [CVE-2023-1917](https://insights.sbomify.com/CVE-2023-1917/): PowerPress <= 10.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4820 and fix it if it is affected.

What it is: CVE-2023-4820 is a medium-severity cross-site scripting vulnerability in Unknown PowerPress Podcasting plugin by Blubrry, published on 16 Oct 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-2023-4820 exists.

Affected product: Unknown PowerPress Podcasting plugin by Blubrry. 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-2023-4820/ (Markdown: https://insights.sbomify.com/CVE-2023-4820/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4820
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4820
- OSV: https://osv.dev/vulnerability/CVE-2023-4820

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4820/
Summaries are generated and may contain mistakes; the official description above is the record.