Post Snippets – Custom WordPress Code Snippets Customizer <= 4.0.19 — Authenticated (Contributor+) Remote Code Execution
CVE-2026-56049Published · Updated Action summary
Affected: ≤4.0.19Update to 4.1.0 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?
Post Snippets – Custom WordPress Code Snippets Customizer post-snippets
- Affected≤ 4.0.19
- Patched in4.1.0
Update to 4.1.0 or newer.
You are affected if you run ≤ 4.0.19. Version 4.1.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Post Snippets – Custom WordPress Code Snippets Customizer.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.1.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Post Snippets – Custom WordPress Code Snippets Customizer to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to daroo.
The Post Snippets – Custom WordPress Code Snippets Customizer plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.0.19. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.
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 Post Snippets – Custom WordPress Code Snippets Customizer
All 11| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes ≤4.2.4Update to 4.2.5 | CVE-2026-77871 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤4.2.4No patch available | CVE-2026-12980 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting via Import ≤4.0.19Update to 4.1.1 | CVE-2026-7430 | |
| High8.8 | Authenticated (Contributor+) Remote Code Execution ≤4.0.12Update to 4.0.13 | CVE-2026-25001 | |
| Medium4.3 | Cross-Site Request Forgery ≤4.0.11Update to 4.0.12 | CVE-2025-63040 |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
≤4.2.4Update to 4.2.5
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤4.2.4No patch available
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting via Import
≤4.0.19Update to 4.1.1
- High8.8Authenticated (Contributor+) Remote Code Execution
≤4.0.12Update to 4.0.13
- Medium4.3Cross-Site Request Forgery
≤4.0.11Update to 4.0.12
Timeline
CVE published
Severity high, CVSS 8.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. 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.