# CVE-2021-37697: Sensitive information leak in Welcome of tmerc-cogs

> Attackers can access sensitive information in tmerc-cogs by crafting specific membership event messages, affecting Red Discord bot users.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-77xv-8c2x-j96j

## What is CVE-2021-37697?

CVE-2021-37697 is a high-severity vulnerability in tmercswims tmerc-cogs, published on 11 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

tmerc-cogs are a collection of open source plugins for the Red Discord bot. A vulnerability has been found in the code that allows any user to access sensitive information by crafting a specific membership event message. Issue is patched in commit d63c49b4cfc30c795336e4fff08cba3795e0fcc0. As a workaround users may unload the Welcome cog.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2021-37697?

It affects 1 product.


Products: Tmerc-Cogs Project Tmerc-Cogs.

## How do I fix CVE-2021-37697?

No fix has been published for CVE-2021-37697 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37697 being exploited?

There is no known exploitation of CVE-2021-37697 in the wild and no public exploit code.

## Other vulnerabilities in tmercswims tmerc-cogs

- [CVE-2021-37696](https://insights.sbomify.com/CVE-2021-37696/): Sensitive information leak in MassDM of tmerc-cogs (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37697 and fix it if it is affected.

What it is: CVE-2021-37697 is a high-severity vulnerability in tmercswims tmerc-cogs, published on 11 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-37697 in the wild and no public exploit code.

Affected product: tmercswims tmerc-cogs. 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-2021-37697/ (Markdown: https://insights.sbomify.com/CVE-2021-37697/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37697
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37697
- OSV: https://osv.dev/vulnerability/CVE-2021-37697

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37697/
Summaries are generated and may contain mistakes; the official description above is the record.