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CVE-2026-63000 medium CVSS 6.4

Cross-Site Request Forgery (CSRF) in redaxo/source (CVE-2026-63000)

Summary

Vulnerability in redaxo/source (CVE-2026-63000). Data can be tampered with by attackers. Exploitable via rex_api_install_package_update. Mitigation: upgrade to 5.21.2 or later.

Original description

The description as published by the source.

Summary

The rex_api_install_package_update API function (install addon) does not override requiresCsrfProtection(), which defaults to false in the base class rex_api_function. Any authenticated admin can therefore be tricked via a CSRF attack into silently triggering a package update from the REDAXO package server.

Details

File: redaxo/src/core/lib/api_function.php:277-280

protected function requiresCsrfProtection()
{
    return false;  // DEFAULT — subclasses must opt in
}

File: redaxo/src/addons/install/lib/api/api_package_update.php:8-39

class rex_api_install_package_update extends rex_api_function
{
    public function execute()
    {
        if (!rex::getUser()?->isAdmin()) {
            throw new rex_api_exception('You do not have the permission!');
        }
        $addonkey = rex_request('addonkey', 'string');
        $fileId = rex_request('file', 'int');
        $installer = new rex_install_package_update();
        // ... downloads and installs $addonkey version $fileId from redaxo.org
    }
    // requiresCsrfProtection() NOT overridden — defaults to false
}

For comparison, rex_api_install_package_add and rex_api_install_package_delete both correctly return true. Only rex_api_install_package_update is missing this.

PoC

<!-- Attacker-controlled page -->

When an authenticated admin visits this page, the request is automatically made with their session cookie, causing some_addon to be…

Source: NIST National Vulnerability Database 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-2026-63000 has been found in redaxo/source.
Attackers can target a specific entry point like rex_api_install_package_update over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 6.4/10.
What to do: upgrade redaxo/source to 5.21.2 or later.
If unsure, ask your IT team or search "redaxo/source CVE-2026-63000" on the vendor's site.

CVE-2026-63000 (redaxo/source) — CWE-352 / CVSS v3 6.4
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: rex_api_install_package_update / install / false / rex_api_function
Patched: 5.21.2 — 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.

❓ What is the problem

CSRF (CWE-352) exists in redaxo/source. Attackers reach the vulnerable code path via rex_api_install_package_update without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of redaxo/source. Attack surface: rex_api_install_package_update / install / false / rex_api_function.

🔥 Severity

Severity: Medium (CVSS 6.4/10). Data can be tampered with by attackers.

🔧 How to fix

Update to 5.21.2.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'redaxo/source' . 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

  1. 1
    Identify exposure identify 
    grep -r 'redaxo/source' . | 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 redaxo/source を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade redaxo/source to 5.21.2

    ステージング環境で 5.21.2 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。

  3. 3
    Post-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

composer redaxo/source
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.21.2"}]}]

References

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