Vulnerability · Published Oct 14, 2026 · Assigned by ENISA
CVE-2026-103904Stored XSS Vulnerability in JTL-Shop
Critical 9.3
In plain English
A critical-severity cross-site scripting in JTL-Shop from JTL-Software GmbH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| JTL-Software GmbH | JTL-Shop | 5.4.0 – before 5.6.55.7.0 – before 5.7.55.8.0 – before 5.8.2 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N