# CVE-2022-31263: Security feature bypass in n/a

> Attackers can bypass email restrictions in Mastodon, potentially allowing unauthorized account creation or access.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 May 2022
- **Updated:** 3 Aug 2024
- **Also known as:** BIT-mastodon-2022-31263, GHSA-54h5-43hp-6q48

## What is CVE-2022-31263?

CVE-2022-31263 is a medium-severity vulnerability in n/a, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

app/models/user.rb in Mastodon before 3.5.0 allows a bypass of e-mail restrictions.

## Which versions are affected by CVE-2022-31263?

1 open source package ship an affected version, including mastodon. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mastodon` | Bitnami | All versions | 3.5.0 |

Products: Joinmastodon Mastodon.

## How do I fix CVE-2022-31263?

Upgrade mastodon to 3.5.0 or later.

## Is CVE-2022-31263 being exploited?

There is no known exploitation of CVE-2022-31263 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-36460](https://insights.sbomify.com/CVE-2023-36460/): Mastodon vulnerable to arbitrary file creation through media attachments (critical 10.0)
- [CVE-2022-2166](https://insights.sbomify.com/CVE-2022-2166/): Improper Restriction of Excessive Authentication Attempts in mastodon/mastodon (critical 9.8)
- [CVE-2022-24307](https://insights.sbomify.com/CVE-2022-24307/): Missing authorization in n/a (critical 9.8)
- [CVE-2018-21018](https://insights.sbomify.com/CVE-2018-21018/): Auth bypass in n/a (critical 9.8)
- [CVE-2024-23832](https://insights.sbomify.com/CVE-2024-23832/): Mastodon Remote user impersonation and takeover (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-31263 and fix it if it is affected.

What it is: CVE-2022-31263 is a medium-severity vulnerability in n/a, published on 24 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-31263 in the wild and no public exploit code.

Affected packages and fixed versions:
- mastodon (Bitnami): affected all versions; fixed in 3.5.0

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-2022-31263/ (Markdown: https://insights.sbomify.com/CVE-2022-31263/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-31263
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-31263
- OSV: https://osv.dev/vulnerability/CVE-2022-31263

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-31263/
Summaries are generated and may contain mistakes; the official description above is the record.