# CVE-2023-24839: HGiga MailSherlock - Reflected XSS

> An unauthenticated remote attacker can inject JavaScript via reflected XSS in HGiga MailSherlock, potentially executing arbitrary code in victim browsers.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Mar 2023
- **Updated:** 19 Feb 2025
- **Also known as:** GHSA-92cv-rhgw-5fm8

## What is CVE-2023-24839?

CVE-2023-24839 is a medium-severity cross-site scripting vulnerability in HGiga MailSherlock, published on 27 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

HGiga MailSherlock’s specific function has insufficient filtering for user input. An unauthenticated remote attacker can exploit this vulnerability to inject JavaScript, conducting a reflected XSS attack.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2023-24839?

It affects 1 product.


Products: Hgiga Oaklouds Mailsherlock.

## How do I fix CVE-2023-24839?

No fix has been published for CVE-2023-24839 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-24839 being exploited?

There is no known exploitation of CVE-2023-24839 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-2023-24842](https://insights.sbomify.com/CVE-2023-24842/): HGiga MailSherlock - Broken Access Control (medium 5.3)
- [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-2023-24839 and fix it if it is affected.

What it is: CVE-2023-24839 is a medium-severity cross-site scripting vulnerability in HGiga MailSherlock, published on 27 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-24839 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-2023-24839/ (Markdown: https://insights.sbomify.com/CVE-2023-24839/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-24839
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-24839
- OSV: https://osv.dev/vulnerability/CVE-2023-24839

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-24839/
Summaries are generated and may contain mistakes; the official description above is the record.