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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63001
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-23 15:17:15 UTC
Updated2026-10-19 20:35:19 UTC
DescriptionREDAXO 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.

Risk And Classification

Primary CVSS: v3.1 4.8 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.001830000 probability, percentile 0.074380000 (date 2026-10-19)

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED4.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Redaxo Redaxo All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Redaxo Core affected < 5.21.2 Not specified

References

ReferenceSourceLinkTags
github.com/redaxo/core/releases/tag/5.21.2 [email protected] github.com Release Notes
github.com/redaxo/core/security/advisories/GHSA-mf2p-wjp4-99pq [email protected] github.com Exploit, Vendor Advisory
github.com/redaxo/core/commit/2daaa3a30570bc76a82f63fd21fb8c9c2cd5dc7c [email protected] github.com Patch
github.com/redaxo/core/pull/6581 [email protected] github.com Issue Tracking, Patch
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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