Create Block Theme < 2.10.0 - Admin+ PHP Code Injection via Pattern Save (Multisite)
Priority LOW 37CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-94.
Summary
The Create Block WordPress plugin before 2.10.0 does not correctly escape user-supplied text before writing it into a generated PHP pattern file, allowing a multisite subsite administrator (who holds the capability gating this action but is denied the capability that normally gates PHP file editing) to inject and execute arbitrary PHP code on the server.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00457 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Create Block Theme (Unknown): 2.10.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Create Block Theme | before 2.10.0 | 2.10.0 | Patch available | CNA |
- Create Block Theme VendorUnknown Affected before 2.10.0 Fixed in 2.10.0 Patch available CNA
Remediation
- Fix · CNA Create Block Theme (Unknown) Fixed in 2.10.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16623
- 2026-10-03 Alias added: GHSA-6wqp-7cwm-r4gv
References
Sources
- CVE-2026-16623 · CVE Program
- CVE-2026-16623 · NVD
- FIRST EPSS
- GHSA-6wqp-7cwm-r4gv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences