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TI-2026-45003 Aliases CVE-2026-63002GHSA-w998-qmw9-mf4m

REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames

Priority MEDIUM 55CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00197 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed core (redaxo): 5.21.2redaxo/source (Packagist): 5.21.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
redaxocorebefore 5.21.25.21.2Patch availableCNA
—redaxo/source (Packagist)before 5.21.25.21.2Patch availableGHSA-w998-qmw9-mf4m
  • core Vendorredaxo Affected before 5.21.2 Fixed in 5.21.2 Patch available CNA
  • redaxo/source (Packagist) Vendor— Affected before 5.21.2 Fixed in 5.21.2 Patch available GHSA-w998-qmw9-mf4m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:*before 5.21.2Vulnerableredaxo
  • cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:* Versions before 5.21.2 Vulnerable ·redaxo

Remediation

  • Fix · CNA core (redaxo) Fixed in 5.21.2
  • Fix · GHSA-w998-qmw9-mf4m redaxo/source (Packagist) Fixed in 5.21.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63002
  2. 2026-10-03 Alias added: GHSA-w998-qmw9-mf4m

References

Exploit 1

Patch 2

Other 2

  • TI-2026-17559 Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read CVSS 4.0HIGH 8.3
  • TI-2025-39517 A Remote Code Execution (RCE) vulnerability in the template management component in… CVSS 3.1HIGH 7.2
  • TI-2024-30898 REDAXO CMS v2.11.0 was discovered to contain a remote code execution (RCE) vulnerability. CVSS 3.1HIGH 7.2
  • TI-2024-30896 An arbitrary file upload vulnerability in the MediaPool module of Redaxo CMS v5.17.1… CVSS 3.1HIGH 7.2
  • TI-2024-16680 Redaxo v5.15.1 was discovered to contain a remote code execution (RCE) vulnerability via… CVSS 3.1HIGH 7.2
  • TI-2024-16678 An issue was discovered in REDAXO version 5.15.1, allows attackers to execute arbitrary… CVSS 3.1HIGH 7.2
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences