Description
KUNO CMS is a fully deployable full-stack blog application. Versions 1.3.13 and below contain validation flaws in its file upload functionality that can be exploited for stored XSS. The upload endpoint only validates file types based on Content-Type headers, lacks file content analysis and extension whitelist restrictions, allowing attackers to upload SVG files containing malicious scripts (disguised as images). When users access the uploaded resource pages, arbitrary JavaScript executes in their browsers. This issue is fixed in version 1.3.14.
Problem types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-434: Unrestricted Upload of File with Dangerous Type
Product status
References
github.com/...8/kuno/security/advisories/GHSA-q3w2-2vqp-gx3r
github.com/...ommit/fc486b5c9091b607f82bf7b354d18f25204f7dc6
github.com/xuemian168/kuno/releases/tag/v1.3.14
