# XSS/HTML Injection Vulnerability in Umbraco Preview Badge

Advisory record · `GHSA-69cg-w8vm-h229`

- **Identifiers:** `GHSA-69cg-w8vm-h229` · `CVE-2024-10761`
- **State:** Confirmed
- **Severity:** CVSS 6.9 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html) · [CWE-94](https://cwe.mitre.org/data/definitions/94.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) · [Code injection](https://agentprime.io/advisories/tag/code-injection.md)
- **Published:** 21 Jan 2025
- **Updated:** 19 Feb 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Jan 2025, 21:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `Umbraco.Cms` (NuGet): affected `>=11.0.0, <13.5.3 || >=14.0.0, <14.3.2 || >=15.0.0, <15.1.2 || >=10.8.7, <10.8.8`; fixed in `13.5.3`, `14.3.2`, `15.1.2`, `10.8.8`
- `Umbraco.Cms.Web.Common` (NuGet): affected `>=11.0.0, <13.5.3 || >=14.0.0, <14.3.2 || >=15.0.0, <15.1.2 || >=10.8.7, <10.8.8`; fixed in `13.5.3`, `14.3.2`, `15.1.2`, `10.8.8`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Umbraco.Cms and Umbraco.Cms.Web.Common versions 10.8.7 to before 10.8.8, 11.0.0 to before 13.5.3, 14.0.0 to before 14.3.2, and 15.0.0 to before 15.1.2 are affected. An authenticated user can exploit a cross-site scripting flaw when viewing previewed content. Upgrade to 10.8.8, 13.5.3, 14.3.2, or 15.1.2; no workaround is listed.

Written 9 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`, from CNA (VulDB)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0061, the 49th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 21 Jan 2025, 10:08 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-69cg-w8vm-h229)
- 31 Oct 2026, 15:22 UTC: First seen by agentprime
- 31 Oct 2026, 15:22 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-69cg-w8vm-h229)

## Sources

- [GitHub Advisory Database: GHSA-69cg-w8vm-h229](https://github.com/advisories/GHSA-69cg-w8vm-h229)
- [OSV: GHSA-69cg-w8vm-h229](https://osv.dev/vulnerability/GHSA-69cg-w8vm-h229)
- <https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-69cg-w8vm-h229>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-10761>
- <https://drive.google.com/file/d/1YoZgdlS3QT7Xu005j9RO-FFUT8RbB0Da/view?usp=sharing>
- <https://github.com/umbraco/Umbraco-CMS>
- <https://vuldb.com/?ctiid.282930>
- <https://vuldb.com/?id.282930>
- <https://vuldb.com/?submit.427091>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-69cg-w8vm-h229>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-69cg-w8vm-h229/>. Everything for agents: <https://agentprime.io/llms.txt>.