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CVE-2026-34989

Ci4-cms-erp Ci4ms cross-site scripting (XSS)

9.0 CRITICALPublic exploitEPSS 0.45%
  1. Published6 Apr 2026

Description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 31.0.0.0, the application fails to properly sanitize user-controlled input when users update their profile name (e.g., full name / username). An attacker can inject a malicious JavaScript payload into their profile name, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This vulnerability is fixed in 31.0.0.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Ci4-cms-erp Ci4ms< 0.31.0.0

Remediation

Fixed in
Ci4-cms-erp Ci4ms≥ 0.31.0.0

References

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Frequently asked

Is CVE-2026-34989 being actively exploited?

CVE-2026-34989 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.45%.

How severe is CVE-2026-34989?

CVE-2026-34989 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.45% probability of exploitation.

Which products are affected by CVE-2026-34989?

Affected products include Ci4-cms-erp Ci4ms.

How do I fix CVE-2026-34989?

Upgrade affected software to a fixed version, for example Ci4-cms-erp Ci4ms 0.31.0.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34989 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.