EUVD-2026-18075
GHSA-85m8-g393-jcxf
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Lifecycle Timeline
4Tags
Description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input when handling backup uploads and processing backup metadata. An attacker can inject a malicious JavaScript payload into the backup filename via the uploaded xss.sql, which uses SQL functionality to insert the XSS payload server-side. This stored payload is later rendered unsafely in multiple backup management views without proper output encoding, leading to stored blind cross-site scripting (Blind XSS). This issue has been patched in version 0.31.0.0.
Analysis
Stored blind cross-site scripting in CI4MS backup management allows authenticated attackers to inject malicious JavaScript payloads via SQL-backed backup filenames, achieving scope change with high confidentiality impact and low integrity/availability impact. The vulnerability exploits insufficient input sanitization during backup upload processing and unsafe output rendering in administrative views. …
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Remediation
Within 24 hours: Identify all CI4MS instances in production and document current versions; verify administrative access logs for suspicious backup filename patterns. Within 7 days: Apply vendor-released patch to version 0.31.0.0 on all CI4MS deployments; audit existing backups for injected payloads in filenames and remove compromised backups. …
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