XSS in Kubysoft
CVE-2025-59903
Stored Cross-Site Scripting (XSS) vulnerability in Kubysoft, where uploaded SVG images are not properly sanitized. This allows attackers to embed malicious scripts within SVG files as visual content, which are then stored on the server and executed in the context of any user accessing the compromised resource.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Kubysoft — versions All versions
Weakness classification (CWE)
References
- www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-kubysoft (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-59903?
- CVE-2025-59903 is a medium-severity vulnerability in Kubysoft, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-02-16.
- How severe is CVE-2025-59903?
- Medium severity. CVSS v3 base score is 5.4 out of 10.