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CVE-2026-1009

🚨 CRITICAL

A stored cross-site scripting (XSS) vulnerability exists in the Altium Forum due to missing server-side input sanitization in forum post content. An authenticated attacker can inject arbitrary JavaScr...

Published
Jan 15, 2026
Last Modified
Jan 16, 2026
Views
10
Bookmarks
0

Description

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A stored cross-site scripting (XSS) vulnerability exists in the Altium Forum due to missing server-side input sanitization in forum post content. An authenticated attacker can inject arbitrary JavaScript into forum posts, which is stored and executed when other users view the affected post. Successful exploitation allows the attacker’s payload to execute in the context of the victim’s authenticated Altium 365 session, enabling unauthorized access to workspace data, including design files and workspace settings. Exploitation requires user interaction to view a malicious forum post.

CVSS Scores

CVSS 3.1 9.0
9.0
CRITICAL
CVSS 2.0 9.0

References

www.altium.com

Additional Information

Source
4760f414-e1ae-4ff1-bdad-c7a9c3538b79
State
Undergoing analysis

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