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OpenAdvisories
High · 8.8 CVE-2026-121862 EUVD-2026-123186GHSA-vxm8-8rj5-3798

Knowledge Building < 0.7.3 - Unauthenticated Stored XSS via knbu_new_reply AJAX Action

Published Nov 11, 2026 · Updated Nov 11, 2026 · Assigned by WPScan

Description

The Knowledge Building WordPress plugin before 0.7.3 does not sanitise and escape comments submitted through its reply feature, and publishes them without moderation, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against any visitor of the affected posts, including administrators.

Affected products

VendorProductAffectedFixed
— Knowledge Building < 0.7.3 0.7.3

References