C9 Blocks

C9 Blocks has 2 disclosed vulnerabilities in the WordSec catalog, all reported in 2025; none of them are fixed as of September 2026. Their average CVSS score is 5.8, and the most serious one scores 6.4 out of 10. 2025 was the busiest year with 2 disclosures.

The most common weakness is Cross-Site Scripting, behind 1 of the records (50%). Other recurring categories include Generation Of Error Message Containing Sensitive Information.

None of the 2 issues recorded for C9 Blocks have a published fix yet, which makes virtual patching the only reliable mitigation. The oldest unresolved one dates back to 2025.

2 independent researchers contributed these findings, one record each.

01234567891020.02.2025Today20.02.20255.3C9 Blocks <= 1.7.7 - Unauthenticated Full Path Disclosure CVSS 5.3 · 20.02.202510.04.20256.4C9 Blocks <= 1.7.7 - Authenticated (Contributor+) Stored Cross-Site Scripting CVSS 6.4 · 10.04.2025

Strategic Overview

Avg CVSSMedium
5.8/ 10
Patch Coverage0%
Open

2

Fixed

0

Get automatic notifications for all C9 Blocks vulnerabilities before they are exploited.

Most severe open issueCVSS 6.4CVE-2025-26951

C9 Blocks <= 1.7.7 - Authenticated (Contributor+) Stored Cross-Site Scripting

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Vulnerability Records

2 records
Showing 1–2 of 2 reports

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C