CVE-2026-34567
An attacker can inject a malicious JavaScript payload into the Categories content, which is then stored server-side.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 creating or editing blog posts within the Categories section. An attacker can inject a malicious JavaScript payload into the Categories content, which is then stored server-side. This stored payload is later rendered unsafely when the Categories are viewed via blog posts, without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
- CVSS 3.1
- 9.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- ci4-cms-erp/ci4ms
- Source
- security-advisories@github.com
References
- https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0Release Notes
- https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-r33w-c82v-x5v7Exploit, Vendor Advisory
- https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-r33w-c82v-x5v7Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.