What’s Vulnerable › Vulnerabilities

CVE-2026-117533: REDAXO 5.18.0 before 5.21.4 Stored XSS via Unsanitized Mediapool SVG Uploads

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-27 · updated 2026-10-27
• Weakness: CWE-79

Description

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.

Affected products

• redaxo core: from 5.18.0 before 5.21.4 — fixed in 5.21.4

How to fix

Upgrade to a fixed version: redaxo core 5.21.4. Check the vendor advisory for mitigations.

References

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

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