XSS in Xuemian168 Kuno

CVE-2025-61681

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-61681?
CVE-2025-61681 is a medium-severity vulnerability in Xuemian168 Kuno, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-10-03.
How severe is CVE-2025-61681?
Medium severity. CVSS v3 base score is 5.4 out of 10.