Medium · CVSS 5.1CVE-2026-117535

REDAXO before 5.21.3 Reflected XSS via opener_link in Media PoolCVE-2026-117535

Answer in brief

CVE-2026-117535 records a Medium severity (CVSS 5.1) vulnerability in REDAXO before 5.21.3 Reflected XSS via opener_link in Media Pool. The current sources do not mark it as known exploited. The current feed maps redaxo/core (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps redaxo/core (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
redaxo/coregeneric	>=0 <5.21.3	5.21.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for redaxo/core.
Review the reported fix. Update redaxo/core to 5.21.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 27, 2026

Sources and claim methodology

Upstream source description

REDAXO before 5.21.3 contains a reflected cross-site scripting vulnerability in the backend media pool detail page, where the opener_link parameter is rendered without HTML escaping. Unauthenticated attackers can lure logged-in backend users with media permissions into clicking a crafted link. The injected script can then read the CSRF token and perform actions with the victim's permissions, including code execution via template or module edits when the victim is an administrator.

Quoted source text, attributed separately from HOL analysis.