# CVE-2020-6777: Stored XSS in Bosch PRAESIDEO and Bosch PRAESENSA Management Interface

> An authenticated admin can inject stored scripts into the Bosch PRAESIDEO/PRAESENSA interface, executing code in other users' browsers.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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:** 14 Jan 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-q729-rgv8-6phg

## What is CVE-2020-6777?

CVE-2020-6777 is a medium-severity cross-site scripting vulnerability in Bosch PRAESENSA, published on 14 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the web-based management interface of Bosch PRAESIDEO until and including version 4.41 and Bosch PRAESENSA until and including version 1.10 allows an authenticated remote attacker with admin privileges to mount a stored Cross-Site-Scripting (XSS) attack against another user. When the victim logs into the management interface, the stored script code is executed in the context of his browser. A successful exploit would allow an attacker to interact with the management interface with the privileges of the victim. However, as the attacker already needs admin privileges, there is no additional impact on the management interface itself.

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

## Which versions are affected by CVE-2020-6777?

It affects 2 products.


Products: Bosch Praesensa Firmware, Bosch Praesideo Firmware.

## How do I fix CVE-2020-6777?

No fix has been published for CVE-2020-6777 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-6777 being exploited?

There is no known exploitation of CVE-2020-6777 in the wild and no public exploit code.

## Other vulnerabilities in Bosch PRAESENSA

- [CVE-2020-6776](https://insights.sbomify.com/CVE-2020-6776/): CSRF in Bosch PRAESIDEO and Bosch PRAESENSA Management Interface (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-6777 and fix it if it is affected.

What it is: CVE-2020-6777 is a medium-severity cross-site scripting vulnerability in Bosch PRAESENSA, published on 14 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-6777 in the wild and no public exploit code.

Affected product: Bosch PRAESENSA. 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-2020-6777/ (Markdown: https://insights.sbomify.com/CVE-2020-6777/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-6777
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-6777
- OSV: https://osv.dev/vulnerability/CVE-2020-6777

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-6777/
Summaries are generated and may contain mistakes; the official description above is the record.