CVE-2026-89145

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

Published Sep 11, 2026 CVSS 4.0 · 2.4 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Flextype
Flextype flextype
Vendors & Products Flextype
Flextype flextype
Type Values Removed Values Added
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.
Title Flextype CMS 0.9.9 through 1.0.0-alpha.3 Stored XSS via Plugin Directory
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 11, 2026, 2:25 PM
Reserved
Sep 11, 2026, 1:04 AM
Status
Deferred
Published
Sep 11, 2026, 2:18 AM
Modified
Sep 24, 2026, 8:43 PM