CVE-2024-49038

Critical

Published: 26 November 2024

Published

26 November 2024

Modified

09 January 2025

KEV Added

—

Patch

—

CVSS Score v3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS Score 0.0023 46.0th percentile

Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-49038 is a critical-severity Cross-site Scripting (CWE-79) vulnerability in Microsoft Copilot Studio. Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 46.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as Enterprise AI Assistants; in the Other ATLAS/OWASP Terms risk domain.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2024-43909

Vulnerability details

Improper neutralization of input during web page generation ('Cross-site Scripting') in Copilot Studio by an unauthorized attacker leads to elevation of privilege over a network.

CWE(s): CWE-79

AI Security AnalysisAI

AI Category: Enterprise AI Assistants
Risk Domain: Other ATLAS/OWASP Terms
OWASP Top 10 for LLMs 2025: None mapped
Classification Reason: Copilot Studio is a Microsoft platform for building and deploying custom AI-powered copilots and conversational agents, fitting the Enterprise AI Assistants category. The XSS vulnerability affects its web interface.

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

XSS vulnerability (CVE-2024-49038) in Copilot Studio enables exploitation of a public-facing web application (T1190) by unauthorized remote attackers, facilitating privilege escalation (T1068).