High · CVSS 8.6CVE-2026-103904

Stored XSS Vulnerability in JTL-ShopCVE-2026-103904

Answer in brief

CVE-2026-103904 records a High severity (CVSS 8.6) vulnerability in Stored XSS Vulnerability in JTL-Shop. The current sources do not mark it as known exploited. The current feed maps JTL-Software GmbH/JTL-Shop (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 14, 2026Updated Oct 14, 2026Source checked Oct 14, 2026First seen by HOL Oct 14, 2026Material review Oct 14, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.6. 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 JTL-Software GmbH/JTL-Shop (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
JTL-Software GmbH/JTL-Shopgeneric	>=5.4.0 <5.6.5 \|\| >=5.7.0 <5.7.5 \|\| >=5.8.0 <5.8.2	5.6.5, 5.7.5, 5.8.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for JTL-Software GmbH/JTL-Shop.
Review the reported fix. Source-reported solution: Manual patches will be published for older unsupported versions (5.4.x and 5.5.x).

Evidence timeline and material changes

Published upstream
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 14, 2026

Sources and claim methodology

Source referencejtl-software.com

Upstream source description

The public consent endpoint of JTL-Shop accepts arbitrary consent names from unauthenticated visitors without validating them against the configured consent items. These names are stored in the consent statistics and rendered without output encoding in the administration backend. An unauthenticated remote attacker can thereby inject script code that is executed in the browser session of an administrator viewing the consent statistics page, allowing actions to be performed with the administrator's privileges.

Quoted source text, attributed separately from HOL analysis.