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.
Metrics
Affected Vendors & Products
References
History
Fri, 16 Jan 2026 18:15:00 +0000
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ssvc
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Fri, 16 Jan 2026 15:45:00 +0000
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| Title | Stored Cross-Site Scripting in Altium Forum Leading to Cross-Customer Data Exposure | Stored Cross-Site Scripting in Altium Enterprise Server Forum Leading to Cross-Customer Data Exposure |
Fri, 16 Jan 2026 14:15:00 +0000
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| First Time appeared |
Altium
Altium altium 365 |
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| Vendors & Products |
Altium
Altium altium 365 |
Thu, 15 Jan 2026 23:00:00 +0000
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| Description | 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. | |
| Title | Stored Cross-Site Scripting in Altium Forum Leading to Cross-Customer Data Exposure | |
| Weaknesses | CWE-284 CWE-79 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Altium
Published:
Updated: 2026-01-16T17:17:45.223Z
Reserved: 2026-01-15T22:08:45.185Z
Link: CVE-2026-1009
Updated: 2026-01-16T17:17:37.928Z
Status : Awaiting Analysis
Published: 2026-01-15T23:15:51.153
Modified: 2026-01-16T15:55:12.257
Link: CVE-2026-1009
No data.