# CVE-2023-4893: Crayon Syntax Highlighter <= 2.8.4 - Authenticated (Contributor+) Server Side Request Forgery

> Authenticated contributors can exploit SSRF in Crayon Syntax Highlighter to query and modify internal services via the crayon shortcode.

- **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:** 12 Sep 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-5vp5-gwxm-8xrq

## What is CVE-2023-4893?

CVE-2023-4893 is a medium-severity server-side request forgery vulnerability in akarmenia Crayon Syntax Highlighter, published on 12 Sep 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Crayon Syntax Highlighter plugin for WordPress is vulnerable to Server Side Request Forgery via the 'crayon' shortcode in versions up to, and including, 2.8.4. This can allow authenticated attackers with contributor-level permissions or above to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2023-4893?

It affects 1 product.


Products: Aramk Crayon-Syntax-Highlighter.

## How do I fix CVE-2023-4893?

No fix has been published for CVE-2023-4893 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4893 being exploited?

There is no known exploitation of CVE-2023-4893 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4893 and fix it if it is affected.

What it is: CVE-2023-4893 is a medium-severity server-side request forgery vulnerability in akarmenia Crayon Syntax Highlighter, published on 12 Sep 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-4893 in the wild and no public exploit code.

Affected product: akarmenia Crayon Syntax Highlighter. 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-2023-4893/ (Markdown: https://insights.sbomify.com/CVE-2023-4893/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4893
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4893
- OSV: https://osv.dev/vulnerability/CVE-2023-4893

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4893/
Summaries are generated and may contain mistakes; the official description above is the record.