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.
History

Mon, 06 Oct 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 06 Oct 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Kuno
Kuno kuno Cms
Vendors & Products Kuno
Kuno kuno Cms

Fri, 03 Oct 2025 22:00:00 +0000

Type Values Removed Values Added
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.
Title Kuno is Vulnerable to Stored XSS Attack via SVG File Upload
Weaknesses CWE-434
CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-10-03T21:46:59.313Z

Updated: 2025-10-06T15:45:27.050Z

Reserved: 2025-09-29T20:25:16.182Z

Link: CVE-2025-61681

cve-icon Vulnrichment

Updated: 2025-10-06T15:44:48.234Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-03T22:15:32.880

Modified: 2025-10-06T14:56:47.823

Link: CVE-2025-61681

cve-icon Redhat

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