CVE-2026-121863: high-severity vulnerability in Knowledge Building
Knowledge Building < 0.7.3 - Reflected XSS via Comment Reply Response
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1
The Knowledge Building WordPress plugin before 0.7.3 does not escape several user-supplied values before echoing them back in the response of an AJAX action available to unauthenticated users, and serves that response as HTML, leading to a Reflected Cross-Site Scripting.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Affected products
Unknown · Knowledge BuildingRelated CVEs — Knowledge Building
In the same product, most dangerous first.