CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the Pages module does not apply the html_purify validation rule to content fields during create and update operations, while the Blog module does. Page content is stored unsanitized in the database and rendered as raw HTML on the public frontend via echo $pageInfo->content. An authenticated admin with page-editing privileges can inject arbitrary JavaScript that executes in the browser of every public visitor viewing the page. This vulnerability is fixed in 0.31.4.0.
CVE-2026-39392
MEDIUMNVD 5.55.5—Elevated
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 5.5(medium)
- EPSS
- 15.9%
- KEV
- Not listed
Published
April 8, 2026
Last Modified
April 16, 2026
References (1)
- security-advisories@githubhttps://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fjpj-6qcq-6pw2
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| ci4-cms-erp/ci4ms | 0.21.0 ... 0.31.3.0 (51 versions) | 0.31.4.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-39392?
CVE-2026-39392 is a medium vulnerability published on April 8, 2026. CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the Pages module does not apply the html_purify validation rule to content fields during create and update operations, while the Blog…
When was CVE-2026-39392 disclosed?
CVE-2026-39392 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39392 actively exploited?
CVE-2026-39392 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39392?
CVE-2026-39392 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-39392?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39392, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-39392
Is Your Infrastructure Affected by CVE-2026-39392?
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