Is CVE-2026-89145 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-89145?

CVE-2026-89145 has a CVSS v3 severity of MEDIUM (4.2).

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CVE-2026-89145

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.