CVE-2026-121862: Knowledge Building (WordPress plugin) · Cross-site Scripting
Affects Knowledge Building (WordPress plugin)Source CVE Database V5
Not known to be exploited : upgrade to 0.7.3 soon.
Data as of 11 Nov 2026, 06:33 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 0.7.3
Exploitation evidence
Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade Knowledge Building (WordPress plugin) to 0.7.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Knowledge Building | Affected
| Fixed in
|
AI-suggested
Upgrade the Knowledge Building plugin to version 0.7.3 or later, where the vulnerability is fixed. No other mitigation is required as the fix addresses the root cause by properly sanitizing and escaping user input.
Description
The Knowledge Building WordPress plugin versions before 0.7.3 contain a stored cross-site scripting (XSS) vulnerability in the reply comment feature. This flaw allows unauthenticated users to submit comments that are not sanitized or escaped and are published without moderation. As a result, attackers can execute stored XSS attacks against any visitor of the affected posts, including administrators. The vulnerability is fixed in version 0.7.3.