Read the docs
TI-2026-45002 Aliases CVE-2026-63001GHSA-mf2p-wjp4-99pq

REDAXO: Stored XSS via Unescaped Media Manager Type Name in `mediaIsInUse()`

Priority LOW 21CWE-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, the mediaIsInUse() handler in redaxo/src/addons/media_manager/lib/media_manager.php inserts a Media Manager type name into raw backend warning HTML without escaping it when invoked through MEDIA_IS_IN_USE. An administrator with Media Manager access can store HTML in a type name, and the payload executes in another administrator's browser when that administrator tries to delete media referenced by the type's effects, enabling session theft or unauthorized backend actions. This issue is fixed in version 5.21.2.

Why it matters now

Exploitation None reported 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
None
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-mf2p-wjp4-99pq
  • 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-mf2p-wjp4-99pq

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-mf2p-wjp4-99pq redaxo/source (Packagist) Fixed in 5.21.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63001
  2. 2026-10-03 Alias added: GHSA-mf2p-wjp4-99pq

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