TI-2026-81113 Aliases CVE-2026-117537 GHSA-76pp-mqrq-h425

Reflected cross-site scripting in REDAXO Metainfo API type parameter

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

Key facts

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

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

Summary

REDAXO core before 5.21.0 is affected. Improper neutralization of input (CWE-79) lets an authenticated attacker inject scripts through the type parameter of the metainfo_default_fields_create API, which is rendered unescaped. An attacker can craft a link with a valid CSRF token and an HTML payload that executes scripts in a victim's backend session.

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

Description from the CNA

REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability that allows authenticated attackers to inject scripts via the type parameter of the metainfo_default_fields_create API. Attackers can craft a link with a valid CSRF token and HTML payload that rex_view::message() renders unescaped, executing scripts in a victim's backend session.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00179 7th percentileScored 2026-11-07

Fix Fixed core (redaxo): 5.21.0

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	before 5.21.0	5.21.0	Patch available	CNA

core Vendorredaxo Affected before 5.21.0 Fixed in 5.21.0 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

Update REDAXO core to 5.21.0, which fixes the flaw.

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

Fix · CNA core (redaxo) Fixed in 5.21.0

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 5.21.0
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-81114 Reflected cross-site scripting in REDAXO backend packages APIPriority MEDIUM 44
Show all 2 records →

Timeline

2026-10-27 Threatist record created from CVE-2026-117537
2026-10-27 CISA SSVC decision points changed
2026-10-27 Alias added: GHSA-76pp-mqrq-h425

References

Advisory 1

GitHub Security Advisory (GHSA-m662-8jrj-cw6v)

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