# CVE-2026-104001: Slim SEO <= 4.11.1 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via 'Biographical Info' User Meta

> Authenticated subscribers can execute arbitrary shortcodes via their profile bio, potentially leading to code execution on front-end pages.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 16 Oct 2026
- **Updated:** 16 Oct 2026
- **Also known as:** GHSA-6247-9gvr-43xh

## What is CVE-2026-104001?

CVE-2026-104001 is a medium-severity code injection vulnerability in rilwis Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The The Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 4.11.1 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary shortcodes. A Subscriber-level user need only save the shortcode payload to their own Biographical Info field via the REST API or wp-admin profile page; the shortcode then executes on any unauthenticated front-end request that resolves that author's description, such as requests using the ?author= query parameter when auto_redirection is disabled.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-104001?


## How do I fix CVE-2026-104001?

No fix has been published for CVE-2026-104001 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104001 being exploited?

There is no known exploitation of CVE-2026-104001 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104001 and fix it if it is affected.

What it is: CVE-2026-104001 is a medium-severity code injection vulnerability in rilwis Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-104001 in the wild and no public exploit code.

Affected product: rilwis Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated. 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-2026-104001/ (Markdown: https://insights.sbomify.com/CVE-2026-104001/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104001
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104001
- OSV: https://osv.dev/vulnerability/CVE-2026-104001

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-104001/
Summaries are generated and may contain mistakes; the official description above is the record.