CVE-2026-34563 is a critical stored Blind Cross-Site Scripting (XSS) vulnerability in CI4MS, a CodeIgniter 4-based CMS skeleton, prior to version 0.31.0.0. It stems from improper input sanitization during backup uploads, allowing an authenticated attacker to inject malicious JavaScript into backup filenames. This payload is then unsafely rendered in backup management views, leading to a CVSS score of 9.1 (CRITICAL). The vulnerability has a network attack vector, low complexity, and high confidentiality impact. There is currently no public exploit code available, nor is it listed in the CISA KEV catalog, though it has garnered minor community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.31.0.0CPE matchmatch criteria | cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.