CVE-2024-35218: medium-severity vulnerability in Umbraco-CMS
Umbraco CMS Vulnerable to Stored XSS on Content Page Through Markdown Editor Preview Pane
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.2epss 0.4%
Umbraco CMS is an ASP.NET CMS used by more than 730.000 websites. Stored Cross-site scripting (XSS) enable attackers that have access to backoffice to bring malicious content into a website or application. This vulnerability has been patched in version(s) 8.18.13, 10.8.4, 12.3.7, 13.1.1 by implementing IHtmlSanitizer.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
Affected products
umbraco · Umbraco-CMSRelated CVEs — Umbraco-CMS
In the same product, most dangerous first.
CVE-2025-24011MEDIUMUmbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response CodesEPSS 1.6%CVE-2023-37267HIGHUmbraco allows possible Admin-level access to backoffice without Auth under rare conditionsEPSS 0.7%CVE-2026-69197HIGHUmbraco: Delivery API leaks protected (Public Access) content through Content Picker / Multi-Node Tree Picker expansionEPSS 0.7%CVE-2025-32017HIGHUmbraco has a Management API Vulnerability to Path Traversal With Authenticated UsersEPSS 0.6%CVE-2023-49089HIGHUmbraco CMS possible path traversal when creating packages from backofficeEPSS 0.6%CVE-2023-49278MEDIUMUmbraco CMS brute force exploit can be used to collect valid usernamesEPSS 0.5%
References
https://github.com/umbraco/Umbraco-CMS/commit/1b712fe6ec52aa4e71b3acf63e393c8e6ab85385https://github.com/umbraco/Umbraco-CMS/commit/a2684069b1e9976444f60b4b37a80be05b87f6b6https://github.com/umbraco/Umbraco-CMS/commit/cbf9f9bcd199d7ca0412be3071d275556f10b7bahttps://github.com/umbraco/Umbraco-CMS/commit/d090176272d07500dac0daee7c598aa8bb321050https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-gvpc-3pj6-4m9w