CVE-2026-103905
Received
Received - Intake
Authentication Bypass in JTL-Shop Admin Backend
Vulnerability report for CVE-2026-103905, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-14
Last updated on: 2026-10-14
Assigner: ENISA
Description
Description
The authentication middleware of the JTL-Shop
administration backend processes the plugin safe mode toggle on the admin
logout route before checking whether the requesting user is
authenticated. An unauthenticated remote attacker can therefore switch the shop's
plugin safe mode on and off, which deactivates all installed plugins and their
functionality, such as payment and shipping integrations, resulting in a shop-wide
denial of service. The attack requires a single request and can be
automated against many installations.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| JTL-Software | GmbH | JTL-Shop 5.3.0 |
| JTL-Software | GmbH | JTL-Shop 5.7.0 |
| JTL-Software | GmbH | JTL-Shop 5.8.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-306 | The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. |
