CVE-2026-78834
High
Description
A code execution vulnerability exists in CMSimple 5.22 in the CoAuthors plugin. An authenticated low-privileged user who can modify page content and provide controlled imported content can trigger server-side execution by referencing crafted external or uploaded text content through the affected content import feature.
SeverityHigh
CVSS8.8
Exploit probability—
Product
CMSimple
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CMSimple | 5.22 | — |
| CoAuthors plugin | No range specified | — |
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