CVE-2026-63190 FearlessCMS - Broken Access Control & Stored XSS

FearlessCMS < 0.1.4 contains multiple vulnerabilities including path traversal, stored and reflected XSS, and arbitrary file write/read due to missing authentication and validation in admin debug scripts, letting attackers deface sites, steal sessions, and exhaust disk space, exploit requires bypassing admin login via crafted URI.

CVSS base score 9.4 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Remote Code Execution, Stored XSS, Reflected XSS, File System Read, File System Write, Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-22

Vendor fix

Update to version 0.1.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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