# CVE-2026-27176: MajorDoMo Reflected Cross-Site Scripting in command.php

> Attackers can execute arbitrary JavaScript in MajorDoMo via reflected XSS in command.php, potentially leading to session hijacking or malicious actions.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/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:** 18 Feb 2026
- **Updated:** 23 Jun 2026
- **Also known as:** GHSA-rpq9-4jjf-2xhh

## What is CVE-2026-27176?

CVE-2026-27176 is a medium-severity cross-site scripting vulnerability in sergejey MajorDoMo, published on 18 Feb 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

MajorDoMo (aka Major Domestic Module) contains a reflected cross-site scripting (XSS) vulnerability in command.php. The $qry parameter is rendered directly into the HTML page without sanitization via htmlspecialchars(), both in an input field value attribute and in a paragraph element. An attacker can inject arbitrary JavaScript by crafting a URL with malicious content in the qry parameter.

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

## Which versions are affected by CVE-2026-27176?

It affects 1 product.


Products: Mjdm Majordomo.

## How do I fix CVE-2026-27176?

No fix has been published for CVE-2026-27176 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-27176 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27176 exists.

Public exploit code:

- MajorDoMo - Cross-Site Scripting (nuclei): http/cves/2026/CVE-2026-27176.yaml

## Other vulnerabilities in sergejey MajorDoMo

- [CVE-2023-50917](https://insights.sbomify.com/CVE-2023-50917/): Command injection in n/a (critical 9.8)
- [CVE-2026-27174](https://insights.sbomify.com/CVE-2026-27174/): MajorDoMo Unauthenticated Remote Code Execution via Admin Console Eval (critical 9.3)
- [CVE-2026-27180](https://insights.sbomify.com/CVE-2026-27180/): MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning (critical 9.3)
- [CVE-2026-27175](https://insights.sbomify.com/CVE-2026-27175/): MajorDoMo Command Injection in rc/index.php via Race Condition (critical 9.2)
- [CVE-2026-27179](https://insights.sbomify.com/CVE-2026-27179/): MajorDoMo Unauthenticated SQL Injection in Commands Module (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-27176 and fix it if it is affected.

What it is: CVE-2026-27176 is a medium-severity cross-site scripting vulnerability in sergejey MajorDoMo, published on 18 Feb 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-2026-27176 exists.

Affected product: sergejey MajorDoMo. 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-2026-27176/ (Markdown: https://insights.sbomify.com/CVE-2026-27176/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27176
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27176
- OSV: https://osv.dev/vulnerability/CVE-2026-27176

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-27176/
Summaries are generated and may contain mistakes; the official description above is the record.