CVE-2026-103905

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.jtl-software.com/de/security/shop-maintenance-mode

Configurations

No configuration.

History

14 Oct 2026, 11:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 11:16

Updated : 2026-10-16 20:04

NVD link : CVE-2026-103905

Mitre link : CVE-2026-103905

CVE.ORG link : CVE-2026-103905

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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