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CVE-2026-89145

Flextype CMS 0.9.9 through 1.0.0-alpha.3 Stored XSS via Plugin Directory

CVSS 4.0 2.4 LOWCVSS 3.1 4.2 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-89145

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-89145

Published

flextype

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "flextype",
                    "product": "flextype",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:composer/flextype/flextype",
                    "versions": [
                        {
                            "version": "0.9.9",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThanOrEqual": "1.0.0-alpha.3"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON