# CVE-2024-25627: Cross-Site Scripting (XSS) via File Upload in Alf.io

> Administrators can upload malicious HTML files leading to persistent XSS, allowing attackers to maintain access; upgrade to the latest version.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Feb 2024
- **Updated:** 26 Aug 2024
- **Also known as:** GHSA-gpmg-8f92-37cf

## What is CVE-2024-25627?

CVE-2024-25627 is a low-severity cross-site scripting vulnerability in alfio-event alf.io, published on 16 Feb 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Alf.io is a free and open source event attendance management system. An administrator on the alf.io application is able to upload HTML files that trigger JavaScript payloads. As such, an attacker gaining administrative access to the alf.io application may be able to persist access by planting an XSS payload. This issue has been addressed in version 2.0-M4-2402. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2024-25627?

It affects 1 product.


Products: Alf Alf.

## How do I fix CVE-2024-25627?

No fix has been published for CVE-2024-25627 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-25627 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-25627 exists.

## Other vulnerabilities in alfio-event alf.io

- [CVE-2023-2259](https://insights.sbomify.com/CVE-2023-2259/): Improper Neutralization of Special Elements Used in a Template Engine in alfio-event/alf.io (critical 9.1)
- [CVE-2024-25635](https://insights.sbomify.com/CVE-2024-25635/): IDOR Vulnerability: Allowing Organization Owner to view the other Organizations API KEY and USERS (high 8.8)
- [CVE-2023-2258](https://insights.sbomify.com/CVE-2023-2258/): Improper Neutralization of Formula Elements in a CSV File in alfio-event/alf.io (high 8.8)
- [CVE-2023-2260](https://insights.sbomify.com/CVE-2023-2260/): Authorization Bypass Through User-Controlled Key in alfio-event/alf.io (high 8.8)
- [CVE-2026-35482](https://insights.sbomify.com/CVE-2026-35482/): alf.io has an Authenticated RCE via Extension Script Sandbox Escape (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-25627 and fix it if it is affected.

What it is: CVE-2024-25627 is a low-severity cross-site scripting vulnerability in alfio-event alf.io, published on 16 Feb 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-25627 exists.

Affected product: alfio-event alf.io. 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-2024-25627/ (Markdown: https://insights.sbomify.com/CVE-2024-25627/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-25627
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-25627
- OSV: https://osv.dev/vulnerability/CVE-2024-25627

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-25627/
Summaries are generated and may contain mistakes; the official description above is the record.