# CVE-2023-24842: HGiga MailSherlock - Broken Access Control

> Unauthenticated attackers can access other users' emails by manipulating user and mail IDs in the URL.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Mar 2023
- **Updated:** 19 Feb 2025
- **Also known as:** GHSA-775x-85h4-43cp

## What is CVE-2023-24842?

CVE-2023-24842 is a medium-severity missing authorization vulnerability in HGiga MailSherlock, published on 27 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

HGiga MailSherlock has vulnerability of insufficient access control. An unauthenticated remote user can exploit this vulnerability to access partial content of another user’s mail by changing user ID and mail ID within URL.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2023-24842?

It affects 1 product.


Products: Hgiga Oaklouds Mailsherlock.

## How do I fix CVE-2023-24842?

No fix has been published for CVE-2023-24842 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-24842 being exploited?

There is no known exploitation of CVE-2023-24842 in the wild and no public exploit code.

## Other vulnerabilities in HGiga MailSherlock

- [CVE-2023-24840](https://insights.sbomify.com/CVE-2023-24840/): HGiga MailSherlock - SQL Injection (high 7.2)
- [CVE-2023-24841](https://insights.sbomify.com/CVE-2023-24841/): HGiga MailSherlock - Command Injection (high 7.2)
- [CVE-2023-24839](https://insights.sbomify.com/CVE-2023-24839/): HGiga MailSherlock - Reflected XSS (medium 6.1)
- [CVE-2018-17542](https://insights.sbomify.com/CVE-2018-17542/): SQL Injection exists in MailSherlock before 1.5.235 for OAKlouds (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-24842 and fix it if it is affected.

What it is: CVE-2023-24842 is a medium-severity missing authorization vulnerability in HGiga MailSherlock, published on 27 Mar 2023. 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-2023-24842 in the wild and no public exploit code.

Affected product: HGiga MailSherlock. 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-2023-24842/ (Markdown: https://insights.sbomify.com/CVE-2023-24842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-24842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-24842
- OSV: https://osv.dev/vulnerability/CVE-2023-24842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-24842/
Summaries are generated and may contain mistakes; the official description above is the record.