CVE-2026-127048: Custom Block Builder (WordPress plugin) · Code Injection
Affects Custom Block Builder (WordPress plugin)Source CVE Database V5
Not known to be exploited : upgrade to 3.0.0 soon.
Data as of 15 Nov 2026, 06:23 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 3.0.0
Exploitation evidence
Disclosed: evidence found.
CVE published 15 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 14 Nov 2026.
What to do
Upgrade Custom Block Builder (WordPress plugin) to 3.0.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Custom Block Builder | Affected
| Fixed in
|
AI-suggested
Upgrade the Custom Block Builder plugin to version 3.0.0 or later, where this vulnerability is fixed. No other mitigation is required as the fix addresses the root cause.
Description
The Custom Block Builder WordPress plugin before version 3.0.0 contains a code injection vulnerability due to improper permission checks on its REST routes. This flaw allows unauthenticated users to execute arbitrary PHP code on the server. The issue is fixed in version 3.0.0.