CVE-2026-34566 is a critical stored DOM-based Cross-Site Scripting (XSS) vulnerability affecting CI4MS, a CodeIgniter 4-based CMS skeleton, in versions prior to 0.31.0.0. This flaw allows authenticated attackers with page management privileges to inject persistent JavaScript payloads into input fields. These payloads are stored server-side and executed without proper output encoding when administrative page lists or public-facing pages are viewed. Rated 9.1 CRITICAL, the vulnerability has a network attack vector and low attack complexity, potentially leading to high confidentiality impact. While there are some community mentions, there is currently no evidence of active exploitation or public exploit code available.
| 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.