# CVE-2024-27794: Cross-site scripting in FileMaker Server

> Reflected XSS in FileMaker Server WebDirect login allows attackers to execute scripts in user sessions, potentially leading to account takeover.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Apr 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-2hh4-qfh8-22w2

## What is CVE-2024-27794?

CVE-2024-27794 is a medium-severity cross-site scripting vulnerability in Claris FileMaker Server, published on 15 Apr 2024. 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

Claris FileMaker Server before version 20.3.2 was susceptible to a reflected Cross-Site Scripting vulnerability due to an improperly handled parameter in the FileMaker WebDirect login endpoint. The vulnerability was resolved in FileMaker Server 20.3.2 by escaping the HTML contents of the login error message on the login page.

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

## Which versions are affected by CVE-2024-27794?

It affects 1 product.


Products: Claris Filemaker Server.

## How do I fix CVE-2024-27794?

No fix has been published for CVE-2024-27794 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-27794 being exploited?

There is no known exploitation of CVE-2024-27794 in the wild and no public exploit code.

## Other vulnerabilities in Claris FileMaker Server

- [CVE-2025-46295](https://insights.sbomify.com/CVE-2025-46295/): Code injection in FileMaker Server (critical 9.8)
- [CVE-2026-86930](https://insights.sbomify.com/CVE-2026-86930/): Information disclosure in FileMaker Server (critical 9.1)
- [CVE-2026-86934](https://insights.sbomify.com/CVE-2026-86934/): Auth bypass in FileMaker Server (critical 9.1)
- [CVE-2026-86926](https://insights.sbomify.com/CVE-2026-86926/): Memory corruption in FileMaker Server (high 7.8)
- [CVE-2024-27790](https://insights.sbomify.com/CVE-2024-27790/): Missing authorization in FileMaker Server (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-27794 and fix it if it is affected.

What it is: CVE-2024-27794 is a medium-severity cross-site scripting vulnerability in Claris FileMaker Server, published on 15 Apr 2024. 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-2024-27794 in the wild and no public exploit code.

Affected product: Claris FileMaker Server. 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-2024-27794/ (Markdown: https://insights.sbomify.com/CVE-2024-27794/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-27794
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-27794
- OSV: https://osv.dev/vulnerability/CVE-2024-27794

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-27794/
Summaries are generated and may contain mistakes; the official description above is the record.