Sign in Sign up
JA · EN · FR
SecPulse
Categories
CVE-2026-63001 medium CVSS 4.8

Cross-Site Scripting (XSS) in redaxo/source (CVE-2026-63001)

Summary

Cross-site scripting in redaxo/source (CVE-2026-63001). Risk of unauthorized operations or information disclosure. Exploitable via name. Mitigation: upgrade to 5.21.2 or later.

Original description

The description as published by the source.

Summary

A stored cross-site scripting (XSS) vulnerability exists in REDAXO CMS 5.x. When an administrator attempts to delete a media file that is referenced by a Media Manager effect, the warning message rendered in the backend includes the type's name field without HTML escaping. An attacker with access to the Media Manager addon can store an XSS payload as a type name; the payload executes in the browser of any administrator who subsequently tries to delete a media file linked to that type's effects. This can lead to session hijacking and full backend account takeover.

Details

File: redaxo/src/addons/media_manager/lib/media_manager.php
Function: mediaIsInUse() — registered on the MEDIA_IS_IN_USE extension point in boot.php

When rex_media_service::deleteMedia() is called, it invokes rex_mediapool::mediaIsInUse($filename), which fires the MEDIA_IS_IN_USE extension point. The media_manager addon's handler queries all effects whose parameters JSON contains the filename, then constructs an HTML anchor with the type name inserted verbatim:

// media_manager.php ~line 457  ← VULNERABLE
$message = ''
    . rex_i18n::msg('media_manager') . ' '
    . rex_i18n::msg('media_manager_effect_name') . ': '
    . (string) $sql->getValue('name')   // ← NO rex_escape() call
    . '';

The returned $message string is concatenated into the exception message thrown by deleteMedia() and rendered by rex_view::error() as raw HTML.

**Contra…

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-2026-63001 has been found in redaxo/source.
Attackers can target a specific entry point like name over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.8/10.
What to do: upgrade redaxo/source to 5.21.2 or later.
If unsure, ask your IT team or search "redaxo/source CVE-2026-63001" on the vendor's site.

CVE-2026-63001 (redaxo/source) — CWE-79 / CVSS v3 4.8
Attack vector: remote (network-reachable)
Attack surface: name / MEDIA_IS_IN_USE / boot.php / parameters
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

Cross-site scripting (XSS) (CWE-79) exists in redaxo/source. Attackers reach the vulnerable code path via name.

📍 Affected scope

Check the vendor advisory for the affected versions of redaxo/source. Attack surface: name / MEDIA_IS_IN_USE / boot.php / parameters.

🔥 Severity

Severity: Medium (CVSS 4.8/10). Risk of unauthorized operations or information disclosure.

🔧 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

We use cookies for analytics and ad measurement. This setting applies to all Game co., Ltd. sites. Details