Cross-Site Scripting (XSS) in ci4-cms-erp/ci4ms (CVE-2026-45138)
Summary
Cross-site scripting in ci4-cms-erp/ci4ms (CVE-2026-45138). Risk of unauthorized operations or information disclosure. Exploitable via html_purify. Mitigation: upgrade to 0.31.9.0 or later.
Original description
The description as published by the source.
CI4MS is a CodeIgniter 4-based content management system skeleton. Prior to version 0.31.9.0, the custom html_purify validation rule used to sanitize blog post bodies relies on by-reference mutation (?string &$str), but CodeIgniter 4's validator passes a local copy of the value, so the sanitized text is silently discarded. The Blog controller writes $lanData['content'] directly into blog_langs.content, and the public template echoes it without escaping — yielding stored XSS executable in any visitor's browser, including the superadmin when previewing or editing posts. Version 0.31.9.0 patches the issue.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-45138 has been found in ci4-cms-erp/ci4ms.
Attackers can target a specific entry point like html_purify over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: upgrade ci4-cms-erp/ci4ms to 0.31.9.0 or later.
If unsure, ask your IT team or search "ci4-cms-erp/ci4ms CVE-2026-45138" on the vendor's site.
CVE-2026-45138 (ci4-cms-erp/ci4ms) — CWE-79 / CVSS v3 5.4
Attack vector: remote (network-reachable)
Attack surface: html_purify / blog_langs.content / backendGuard / blogs.create
Patched: 0.31.9.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in ci4-cms-erp/ci4ms. Attackers reach the vulnerable code path via html_purify.
Check the vendor advisory for the affected versions of ci4-cms-erp/ci4ms. Attack surface: html_purify / blog_langs.content / backendGuard / blogs.create.
Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure.
Update to 0.31.9.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'ci4-cms-erp/ci4ms' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'ci4-cms-erp/ci4ms' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
ci4-cms-erp/ci4msを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade ci4-cms-erp/ci4ms to 0.31.9.0ステージング環境で 0.31.9.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com