CVE-2026-1011

MEDIUM

6.1

Description

A stored cross-site scripting (XSS) vulnerability exists in the Altium Support Center AddComment endpoint due to missing server-side input sanitization. Although the client interface applies HTML escaping, the backend accepts and stores arbitrary HTML and JavaScript supplied via modified POST requests. The injected content is rendered verbatim when support cases are viewed by other users, including support staff with elevated privileges, allowing execution of arbitrary JavaScript in the victim’s browser context.

CVE Details

CVSS v3.1 Score6.1

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published1/16/2026

Last Modified1/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

altium:altium_live

Weaknesses (CWE)

CWE-79CWE-116CWE-79

References

https://www.altium.com/platform/security-compliance/security-advisories(4760f414-e1ae-4ff1-bdad-c7a9c3538b79)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.