What’s Vulnerable › Vulnerabilities

CVE-2025-59903: Stored Cross-Site Scripting (XSS) in Kubysoft

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-16 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• Kubysoft: all versions

References

• https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-kubysoft

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