Medium severity4.2NVD Advisory· Published Sep 11, 2026

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.

Affected products

Flextype/Flextypereferences2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: 0.9.9 - 1.0.0-alpha.3

Patches

Vulnerability mechanics

References

github.com/flextype/flextype/blob/aea4ead8c449ea5517ed53b6dcbd28b0a528ad9d/src/flextype/core/Plugins.phpnvd
github.com/flextype/flextype/issues/597nvd
www.vulncheck.com/advisories/flextype-cms-0.9.9-through-1.0.0-alpha.3-stored-xss-via-plugin-directorynvd

News mentions

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ransomware	0.000