# CVE-2023-6561: Cross-site scripting in Featured Image from URL (FIFU)

> Authenticated contributors can inject arbitrary scripts via featured image alt text, leading to stored XSS execution for other users.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 11 Jan 2024
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-m5hc-cfwh-w6jp

## What is CVE-2023-6561?

CVE-2023-6561 is a medium-severity cross-site scripting vulnerability in marceljm Featured Image from URL (FIFU), published on 11 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Featured Image from URL (FIFU) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the featured image alt text in all versions up to, and including, 4.5.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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

## Which versions are affected by CVE-2023-6561?

It affects 1 product.


Products: Fifu Featured Image From Url.

## How do I fix CVE-2023-6561?

No fix has been published for CVE-2023-6561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6561 being exploited?

There is no known exploitation of CVE-2023-6561 in the wild and no public exploit code.

## Other vulnerabilities in marceljm Featured Image from URL (FIFU)

- [CVE-2024-1496](https://insights.sbomify.com/CVE-2024-1496/): Featured Image from URL (FIFU) <= 4.6.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via fifu_input_url (medium 6.4)
- [CVE-2022-2241](https://insights.sbomify.com/CVE-2022-2241/): Featured Image from URL < 4.0.0 - Arbitrary Settings Update to Stored XSS via CSRF (medium 6.1)
- [CVE-2022-2278](https://insights.sbomify.com/CVE-2022-2278/): Featured Image from URL < 4.0.1 - Admin+ Stored Cross-Site Scripting (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6561 and fix it if it is affected.

What it is: CVE-2023-6561 is a medium-severity cross-site scripting vulnerability in marceljm Featured Image from URL (FIFU), published on 11 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-6561 in the wild and no public exploit code.

Affected product: marceljm Featured Image from URL (FIFU). 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-2023-6561/ (Markdown: https://insights.sbomify.com/CVE-2023-6561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6561
- OSV: https://osv.dev/vulnerability/CVE-2023-6561

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-6561/
Summaries are generated and may contain mistakes; the official description above is the record.