TI-2026-81109 Aliases CVE-2026-117533 GHSA-7mw4-9872-fvq7

Stored XSS in REDAXO mediapool through unsanitized SVG uploads

LOW 10CWE-79Published 2026-10-27 · Updated 2026-10-27

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

REDAXO from 5.18.0 before 5.21.4 contains a cross-site scripting flaw (CWE-79) because rex_media_service moves uploaded SVG files into the public media folder before sanitizing them. An authenticated user with mediapool upload rights can race the sanitizer or exhaust memory limits to leave script-laden SVGs publicly served. Scripts then run in the browsers of victims' backend sessions, and the attack is hard to carry out and needs user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00127 2nd percentileScored 2026-11-07

Fix Fixed core (redaxo): 5.21.4

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

Vendor	Product	Affected versions	Fixed in	Status	Source
redaxo	core	5.18.0 to before 5.21.4	5.21.4	Patch available	CNA

core Vendorredaxo Affected 5.18.0 to before 5.21.4 Fixed in 5.21.4 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:redaxo:redaxo::::::::	—	—	redaxo

cpe:2.3:a:redaxo:redaxo:*:*:*:*:*:*:*:* Versions — — ·redaxo

Remediation

Upgrade REDAXO core to version 5.21.4 or later. Version 5.21.4 is the fixed release for redaxo core.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA core (redaxo) Fixed in 5.21.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-27
redaxo core 5.21.4
6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2026-81108 Authentication bypass in REDAXO Core history plugin allows token forgeryPriority MEDIUM 49
- TI-2026-81104 Missing authorization in REDAXO version and history previewsPriority LOW 31
- TI-2026-81106 REDAXO slice operations allow editors to modify others' slicesPriority LOW 30
Show all 6 records →

Timeline

2026-10-27 Threatist record created from CVE-2026-117533
2026-10-27 CISA SSVC decision points changed
2026-10-27 Alias added: GHSA-7mw4-9872-fvq7

References

Advisory 1

GitHub Security Advisory (GHSA-2p3g-jr7p-qwwx)

TI-2018-15578 Redaxo CMS Mediapool Addon 5.5.1 Arbitrary File Upload CVSS 4.0HIGH 8.7
TI-2026-17559 Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read CVSS 4.0HIGH 8.3
TI-2026-38656 Unrestricted file upload in redaxo core CVSS 3.1HIGH 7.5
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

See all 48 →

Sources

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