# CVE-2024-13646: Single-user-chat <= 0.5 - Authenticated (Subscriber+) Limited Options Update

> Authenticated subscribers can modify site options to cause denial of service or enable registration due to insufficient validation.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`)
- **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:** 30 Jan 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-7g73-rmvj-m738

## What is CVE-2024-13646?

CVE-2024-13646 is a high-severity missing authorization vulnerability in aakashbhagat23 Single-user-chat, published on 30 Jan 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Single-user-chat plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to insufficient validation on the 'single_user_chat_update_login' function in all versions up to, and including, 0.5. This makes it possible for authenticated attackers, with subscriber-level access and above, to update option values to 'login' on the WordPress site. This may be leveraged to update an option that would create an error on the site and deny service to legitimate users or be used to set some values to true such as registration.

Weakness: CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2024-13646?

It affects 1 product.


Products: Aakashbhagat Single User Chat.

## How do I fix CVE-2024-13646?

No fix has been published for CVE-2024-13646 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-13646 being exploited?

There is no known exploitation of CVE-2024-13646 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-13646 and fix it if it is affected.

What it is: CVE-2024-13646 is a high-severity missing authorization vulnerability in aakashbhagat23 Single-user-chat, published on 30 Jan 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-13646 in the wild and no public exploit code.

Affected product: aakashbhagat23 Single-user-chat. 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-2024-13646/ (Markdown: https://insights.sbomify.com/CVE-2024-13646/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-13646
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-13646
- OSV: https://osv.dev/vulnerability/CVE-2024-13646

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-13646/
Summaries are generated and may contain mistakes; the official description above is the record.