Stored Cross-Site Scripting (XSS) in Kubysoft
Priority LOW 22CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00158 5th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59903
- 2026-10-03 Alias added: GHSA-fvcr-8w5m-c388
References
More Kubysoft vulnerabilities
- TI-2025-37314 Stored Cross-Site Scripting vulnerability in Kubysoft CVSS 4.0MEDIUM 5.1
- TI-2025-37315 Reflected Cross-Site Scripting (XSS) in Kubysoft CVSS 4.0MEDIUM 4.8
Sources
- CVE-2025-59903 · CVE Program
- CVE-2025-59903 · NVD
- FIRST EPSS
- GHSA-fvcr-8w5m-c388 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences