Reflected Cross-Site Scripting in Knowledge Building WordPress Plugin
CVE-2026-121863
Currently unrated
Key Information:
- Vendor
WordPress
- Status
- Vendor
- CVE Published:
- 11 November 2026
Badges
👾 Exploit Exists🟡 Public PoC
What is CVE-2026-121863?
The Knowledge Building WordPress plugin versions prior to 0.7.3 allows unauthenticated users to trigger a reflected cross-site scripting (XSS) vulnerability. This is due to the plugin's failure to properly escape user-supplied values before returning them in the response of AJAX actions. Attackers may exploit this vulnerability to execute malicious scripts in the context of users' browsers, compromising the security of the site and its users.
Affected Version(s)
Knowledge Building 0 < 0.7.3
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.