What’s Vulnerable › Vulnerabilities

CVE-2025-15549: FluentCMS 2026 Stored XSS via SVG Upload in File Management

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-29 · updated 2026-06-17
• Weakness: CWE-79

Description

FluentCMS 2026 contains a stored cross-site scripting vulnerability that allows authenticated administrators to upload SVG files with embedded JavaScript via the File Management module. Attackers can upload malicious SVG files that execute JavaScript in the browser of any user accessing the uploaded file URL.

Affected products

• FluentCMS: through 0.0.5

References

• https://github.com/fluentcms/FluentCMS/issues/2404
• https://www.vulncheck.com/advisories/fluentcms-stored-xss-via-svg-upload-in-file-management

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