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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/xuemian168/kuno/security/advisories/GHSA-q3w2-2vqp-gx3r
Patch x_refsource_misc
https://github.com/xuemian168/kuno/commit/fc486b5c9091b607f82bf7b354d18f25204f7dc6
Release Notes x_refsource_misc
https://github.com/xuemian168/kuno/releases/tag/v1.3.14
Scores
CVSS v3
5.4
EPSS
0.0002
EPSS Percentile
5.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-434
CWE-79
Status
published
Products (1)
xuemian168/kuno
< 1.3.14
Published
Oct 03, 2025
Tracked Since
Feb 18, 2026