Cyber Resilience

CVE-2024-35218

Medium

Published: 21 May 2024

Published
21 May 2024
Modified
12 February 2025
KEV Added
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Patch
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CVSS Score v3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
EPSS Score 0.0070 72.6th percentile
Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-35218 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Umbraco Umbraco Cms. Its CVSS base score is 4.2 (Medium).

Operationally, ranked in the top 27.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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,…

more

10.8.4, 12.3.7, 13.1.1 by implementing IHtmlSanitizer.

CWE(s)
CWE-79

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

umbraco
umbraco cms
8.0.0 — 8.18.13 · 10.0.0 — 10.8.4 · 12.0.0 — 12.3.7

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References