CVE-2026-117533

MEDIUM 4.4

REDAXO 5.18.0 before 5.21.4 Stored XSS via Unsanitized Mediapool SVG Uploads

CVSS Score

4.4

EPSS Score

0.0%

EPSS Percentile

0th

REDAXO from 5.18.0 before 5.21.4 contains a stored cross-site scripting vulnerability because rex_media_service moves uploaded SVG files into the public media folder before sanitizing them. Authenticated users with mediapool upload rights can race the sanitizer or exhaust memory limits to leave script-laden SVGs publicly served, executing scripts in victims' backend sessions.

CWE	CWE-79
Vendor	redaxo
Product	core
Published	Oct 27, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

redaxo / core

5.18.0 < 5.21.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/redaxo/core/security/advisories/GHSA-2p3g-jr7p-qwwx vulncheck.com: https://www.vulncheck.com/advisories/redaxo-5.18.0-before-5.21.4-stored-xss-via-unsanitized-mediapool-svg-uploads

Credits

🔍 alham-rizvi