CVE-2026-89145
Flextype CMS 0.9.9 through 1.0.0-alpha.3 Stored XSS via Plugin Directory
CVSS Score
4.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | flextype |
| Product | flextype |
| Published | Sep 11, 2026 |
| Last Updated | Sep 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
flextype / flextype
0.9.9 ≤ 1.0.0-alpha.3
References
github.com: https://github.com/flextype/flextype/issues/597 github.com: https://github.com/flextype/flextype github.com: https://github.com/flextype/flextype/blob/aea4ead8c449ea5517ed53b6dcbd28b0a528ad9d/src/flextype/core/Plugins.php#L345 vulncheck.com: https://www.vulncheck.com/advisories/flextype-cms-0.9.9-through-1.0.0-alpha.3-stored-xss-via-plugin-directory
Credits
Ali Khafagy