# CVE-2026-54217: TeamDavid: Stored XSS in web application

> Attackers can inject malicious JavaScript via email, triggering stored XSS when users view the message, potentially leading to session hijacking or code execution.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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:** 7 Aug 2026
- **Updated:** 7 Sep 2026
- **Also known as:** GHSA-j27m-9gf8-vm7r

## What is CVE-2026-54217?

CVE-2026-54217 is a medium-severity cross-site scripting vulnerability in Tobit Laboratories AG TeamDavid, published on 7 Aug 2026. 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

Tobit Laboratories AG TeamDavid's Webbox application is vulnerable to a stored XSS vulnerability. An 
attacker can send an email containing malicious JavaScript code. When a 
user accesses the email, the 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.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-54217?


## How do I fix CVE-2026-54217?

No fix has been published for CVE-2026-54217 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-54217 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54217 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54217 and fix it if it is affected.

What it is: CVE-2026-54217 is a medium-severity cross-site scripting vulnerability in Tobit Laboratories AG TeamDavid, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, 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-2026-54217 exists.

Affected product: Tobit Laboratories AG TeamDavid. 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-2026-54217/ (Markdown: https://insights.sbomify.com/CVE-2026-54217/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54217
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54217
- OSV: https://osv.dev/vulnerability/CVE-2026-54217

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54217/
Summaries are generated and may contain mistakes; the official description above is the record.