# CVE-2025-59026: Cross-site scripting in OX App Suite

> Attackers can execute script code and exfiltrate sensitive data via malicious file uploads in OX App Suite.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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 Nov 2025
- **Updated:** 1 Dec 2025
- **Also known as:** GHSA-6x9p-798x-gxm4

## What is CVE-2025-59026?

CVE-2025-59026 is a medium-severity cross-site scripting vulnerability in Open-Xchange GmbH OX App Suite, published on 27 Nov 2025. 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

Malicious content uploaded as file can be used to execute script code when following attacker-controlled links. Unintended actions can be executed in the context of the users account, including exfiltration of sensitive information. Please deploy the provided updates and patch releases. No publicly available exploits are known

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

## Which versions are affected by CVE-2025-59026?


## How do I fix CVE-2025-59026?

No fix has been published for CVE-2025-59026 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-59026 being exploited?

There is no known exploitation of CVE-2025-59026 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-59026 and fix it if it is affected.

What it is: CVE-2025-59026 is a medium-severity cross-site scripting vulnerability in Open-Xchange GmbH OX App Suite, published on 27 Nov 2025. 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-2025-59026 in the wild and no public exploit code.

Affected product: Open-Xchange GmbH OX App Suite. 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-2025-59026/ (Markdown: https://insights.sbomify.com/CVE-2025-59026/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-59026
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-59026
- OSV: https://osv.dev/vulnerability/CVE-2025-59026

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-59026/
Summaries are generated and may contain mistakes; the official description above is the record.