Create Block <= 2.9.0 — Code Injection to Authenticated (Admin+) PHP Code Injection
CVE-2026-16623Published · Updated Action summary
Affected: ≤2.9.0Update to 2.10.0 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Create Block Theme create-block-theme
- Affected≤ 2.9.0
- Patched in2.10.0
Update to 2.10.0 or newer.
You are affected if you run ≤ 2.9.0. Version 2.10.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Create Block Theme.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 2.10.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Create Block Theme to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Pavan Saxena.
The Create Block plugin for WordPress is vulnerable to Code Injection in versions up to, and including, 2.9.0. This is due to use of `edit_theme_options` instead of `edit_themes` in the REST route permission callbacks, allowing sub-site administrators on multisite installations (who hold `edit_theme_options` but not `edit_themes`) to reach filesystem-mutating endpoints. This makes it possible for authenticated attackers, with admin-level access and above, to inject arbitrary PHP code into theme files by exploiting the overly permissive capability check that granted sub-site administrators on multisite access to theme-file-mutating REST endpoints.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Create Block Theme
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.8 | Unauthenticated Arbitrary File Upload ≤1.2.1Update to 1.2.2 | — |
- Critical9.8Unauthenticated Arbitrary File Upload
≤1.2.1Update to 1.2.2
Timeline
CVE published
Severity high, CVSS 8.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.