CI4MS: Permissions Management Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

published 2026-03-30 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-17213 , GHSA-rpjr-985c-qhvm

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits: 0; none known

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 within group and role management functionality. Multiple input fields (three distinct group-related fields) can be injected with malicious JavaScript payloads, which are then stored server-side. These stored payloads are later rendered unsafely within privileged administrative views without proper output encoding, leading to stored cross-site scripting (XSS) within the role and permission management context. This issue has been patched in version 0.31.0.0.

Patch / fix

fixed in 2

packagist ci4-cms-erp/ci4ms 0.31.0.0
ci4-cms-erp ci4ms 0.31.0.0

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-31)

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-rpjr-985c-qhvm referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
GitHub	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
NVD	3.1	9.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	ci4-cms-erp/ci4ms	<0.31.0.0	0.31.0.0

Affected products

ci4-cms-erp ci4ms

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /ci4-cms-erp/ci4ms/security/advisories/GHSA-rpjr-985c-qhvm
exploit, web, mitigation, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-34557
advisory
github.com /ci4-cms-erp/ci4ms
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary