CI4MS: System Settings (Company Information) Full Platform Compromise & Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.7 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

EPSS

• CVE-2026-34562: 0.28% estimated exploitation activity in the next 30 days; percentile 20.40 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Vulnerability: Stored DOM XSS via System Settings – Company Information (Same-Page Attribute Breakout & Persistent Payload Injection) - Stored Cross-Site Scripting via Unsanitized Company Information Configuration Fields with Immediate Same-Page Execution Description The application fails to properly sanitize user-controlled input within System Settings – Company Information. Several administrative configuration fields accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. Affected fields include, but are not limited to: 1. Company Name 2. Slogan 3. Company Phone 4. Company Mobile 5. Company Email 6. Google Maps iframe link 7. Company Logo and other media-related fields Unlike the public-facing landing page injection vulnerability, this issue executes directly on the same settings page. The injected payload breaks out of the HTML attribute context and is immediately interpreted by the browser when rendered, resulting in…

Published by the source

1 Apr 2026, 22:03 UTC

Last modified by the source

6 Apr 2026, 17:14 UTC

Source last checked

26 Oct 2026, 14:39 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-v897-c6vq-6cr3

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# Patch Next advisory brief: CVE-2026-34562

Advisory: CI4MS: System Settings (Company Information) Full Platform Compromise & Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS
IDs: CVE-2026-34562, GHSA-v897-c6vq-6cr3
Record: https://patchnext.com/advisories/cve-2026-34562 (revision 1, source checked 26 Oct 2026, 14:39 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: ci4-cms-erp/ci4ms 0.31.0.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist ci4-cms-erp/ci4ms: affected <= 0.28.6.0; fixed in 0.31.0.0

## Suggested inspection (read-only)
- Packagist ci4-cms-erp/ci4ms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on ci4-cms-erp/ci4ms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-v897-c6vq-6cr3 (GitHub-reviewed advisory GHSA-v897-c6vq-6cr3 lists affected ranges: Packagist ci4-cms-erp/ci4ms >=0 <=0.28.6.0)

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