CVE-2026-89145
Medium
Description
Flextype CMS versions 0.9.9 through 1.0.0-alpha.3 fail to HTML-escape plugin directory names in the dependency error page rendered by getValidPluginsDependencies(). Attackers with write access to the plugins directory can create a plugin with HTML characters in its name to execute arbitrary scripts in users' browsers when dependency validation fails.
SeverityMedium
CVSS4.2
Exploit probability—
ProductFlextype
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| flextype flextype | 0.9.9 ≤ v ≤ 1.0.0-alpha.3 | — |
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