CVE-2026-35035: CI4MS Cross-Site Scripting Vulnerability

CRITICAL
Advisory Identifier: GHSA-5ghq-42rg-769x
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CVSS 9.1
CWE-79
Published
Advisory Summary

CVE-2026-35035 is a CRITICAL (CVSS 9.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting CI4MS libraries in the Packagist ecosystem. The issue involves company information public-facing page full platform compromise & full account takeover for all roles & privilege-escalation via system settings company information stored dom xss. Remediation is available by upgrading affected packages to version 0.31.2.0.

CVE-2026-35035 at a Glance

CVE Identifier CVE-2026-35035
GHSA Identifier GHSA-5ghq-42rg-769x
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product CI4MS
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-35035

To remediate this vulnerability, upgrade all affected CI4MS dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ci4-cms-erp/ci4ms fixed: 0.31.2.0 
Upgrade ci4-cms-erp/ci4ms to 0.31.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for ci4-cms-erp/ci4ms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-35035, inspect your project dependencies for CI4MS:

inspect dependencies for ci4-cms-erp/ci4ms

Analyze the terminal output to locate any version of CI4MS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.31.2.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In CI4MS, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An attacker can acheive Full Account Takeover & Privilege Escalation via Stored DOM Blind XSS on public-facing landing pages through the System Settings Company Information section which allows the injection of XSS payloads

CVE-2026-35035 Affected CI4MS Versions

1 component(s)
Fixed Versions:
0.31.2.0
Product / Package Ecosystem Affected Versions Fixed Version
ci4-cms-erp/ci4ms
 Packagist
< 0.31.2.0
0.31.2.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5ghq-42rg-769x
NVD — CVE-2026-35035 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35035
CI4MS Source Repository REPOSITORY
https://github.com/ci4-cms-erp/ci4ms
CI4MS Release RELEASE
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.2.0

Frequently Asked Questions

What is CVE-2026-35035?
CVE-2026-35035 is a security vulnerability in CI4MS involving Company Information Public-Facing Page Full Platform Compromise & Full Account Takeover for All Roles & Privilege-Escalation via System Settings Company Information Stored DOM XSS under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which CI4MS versions are affected?
Affected versions include releases prior to 0.31.2.0 across affected packages: ci4-cms-erp/ci4ms.
What version fixes CVE-2026-35035?
Upgrading to 0.31.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ci4-cms-erp/ci4ms affected?
Yes, ci4-cms-erp/ci4ms is affected in releases prior to 0.31.2.0. Upgrade your dependency to 0.31.2.0 or later.
What is the CVSS score of CVE-2026-35035?
CVE-2026-35035 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-35035?
CVE-2026-35035 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2026-35035?
Run the dependency tree command: 'inspect dependencies for ci4-cms-erp/ci4ms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5ghq-42rg-769x",
  "modified" : "2026-04-30T18:33:07Z",
  "published" : "2026-04-06T17:53:02Z",
  "aliases" : [ "CVE-2026-35035" ],
  "summary" : "CI4MS: Company Information Public-Facing Page Full Platform Compromise & Full Account Takeover for All Roles & Privilege-Escalation via System Settings Company Information Stored DOM XSS",
  "details" : "An attacker can acheive Full Account Takeover & Privilege Escalation via Stored DOM Blind XSS on public-facing landing pages through the System Settings Company Information section which allows the injection of XSS payloads",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "ci4-cms-erp/ci4ms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.31.2.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.31.1.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-5ghq-42rg-769x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35035"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ci4-cms-erp/ci4ms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.2.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-06T17:53:02Z",
    "nvd_published_at" : "2026-04-06T17:17:12Z"
  }
}