CVE-2025-59903: Stored Cross-Site Scripting (XSS) vulnerability in Kubysoft, where uploaded SVG images are not properly saniti

Routine

MEDIUM 5.4MITIGATE

CVE-2025-59903 is a medium-severity flaw (CVSS 5.4) affecting kubysoft. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-16
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: kubysoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-16 10:16 UTCPublished CVE record published
2026-06-17 09:46 UTCUpdated Record last modified

kubysoft kubysoft MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kubysoft || rpm -q kubysoft || kubysoft --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-59903?

kubysoft: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-59903 being exploited?

CVE-2025-59903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-59903 affect?

CVE-2025-59903 affects kubysoft. Severity is medium (CVSS 5.4). 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

How urgent is CVE-2025-59903?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2025-59905 MEDIUM 6.1 MITIGATE Cross-Site Scripting (XSS) vulnerability reflected in Kubysoft, which occurs through multiple parameters withi
CVE-2025-59904 MEDIUM 5.4 MITIGATE Stored Cross-Site Scripting (XSS) vulnerability in Kubysoft, which is triggered through multiple parameters in

References

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