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CVE-2026-63002— REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames

Quick assessment

Affected
redaxo core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregist

CVSS 4.8 · Medium
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I. Basic Information for CVE-2026-63002

Vulnerability Information

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Vulnerability Title
REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
Source: CVE Program / CVE List V5
Vulnerability Description
REDAXO is a PHP-based content management system. Prior to 5.21.2, redaxo/src/addons/mediapool/pages/sync.php inserts filenames held in $diffFiles from the media filesystem into the Mediapool Sync page without rex_escape(). An attacker who can place an unregistered file with HTML metacharacters in the media directory can execute script in the browser of a backend user with media[sync] permission when that user opens the Sync page, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
redaxo core < 5.21.2 -

II. Public POCs for CVE-2026-63002

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III. Intelligence Information for CVE-2026-63002

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Patches & Fixes for CVE-2026-63002 (2)

Vendor Pages for CVE-2026-63002 (1)

Other References for CVE-2026-63002 (1)

Same Patch Batch · redaxo · 2026-09-23 · 4 CVEs total

CVE-2026-63000 6.4 MEDIUM REDAXO: Missing CSRF Protection on Package Update Action Allows Forced Addon Updates
CVE-2026-63001 4.8 MEDIUM REDAXO: Stored XSS via Unescaped Media Manager Type Name in `mediaIsInUse()`
CVE-2026-62998 4.3 MEDIUM REDAXO: Unwhitelisted ORDER BY Column in rex_list Allows Authenticated Column Enumeration

IV. Related Vulnerabilities

Same product: core
Same vendor: redaxo
Same weakness: CWE-79

V. Comments for CVE-2026-63002

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