WordPress plugin
C9 Blocks security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical0
- High0
- Medium2
- Low0
All C9 Blocks vulnerabilities
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C9 Blocks: common questions
Does C9 Blocks have known vulnerabilities?
Yes. VulnCrest Radar lists 2 known vulnerabilities in C9 Blocks: 2 medium. At least one is not fixed in the latest version.
How do I check which version of C9 Blocks I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent C9 Blocks vulnerability?
CVE-2025-26951, published Apr 10, 2025: C9 Blocks <= 1.7.7 - Authenticated (Contributor+) Stored Cross-Site Scripting. Severity: Medium (CVSS 6.4).
Is any C9 Blocks vulnerability listed in CISA KEV?
No. None of the known C9 Blocks vulnerabilities is currently listed in the CISA KEV catalog.