CVE-2024-55488

MediumPublic PoC

Published: 22 January 2025

Published

22 January 2025

Modified

31 December 2025

KEV Added

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Patch

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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Score 0.0029 53.1th percentile

Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-55488 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Umbraco Umbraco Cms. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked in the top 46.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2024-52775

Vulnerability details

A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload. NOTE: This has been disputed by the vendor since this potential attack is only possible via authenticated…

users who have been manually allowed access to the CMS. There was a deliberate decision made not to apply HTML sanitization at the product level.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.007 JavaScript Execution

Adversaries may abuse various implementations of JavaScript for execution.

attack.mitre.org →

T1056.001 Keylogging Collection

Adversaries may log user keystrokes to intercept credentials as the user types them.

attack.mitre.org →

T1550.004 Web Session Cookie Lateral Movement

Adversaries can use stolen session cookies to authenticate to web applications and services.

attack.mitre.org →

T1539 Steal Web Session Cookie Credential Access

An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.

attack.mitre.org →

T1555.003 Credentials from Web Browsers Credential Access

Adversaries may acquire credentials from web browsers by reading files specific to the target browser.

attack.mitre.org →

Why these techniques?

Stored XSS allows authenticated attackers to inject and persist arbitrary JavaScript payloads in rich text content, enabling execution of JS (T1059.007), keylogging (T1056.001), and theft of web session cookies or browser credentials (T1506, T1539, T1555.003) when victims view affected pages.