Vulnerability · Published Oct 14, 2026 · Assigned by ENISA

CVE-2026-103905Unauthenticated Plugin Safe Mode Toggle Vulnerability in JTL-Shop

High 7.5

In plain English

A high-severity missing authentication 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 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 54.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
JTL-Software GmbH	JTL-Shop	5.3.0 – before 5.6.55.7.0 – before 5.7.55.8.0 – before 5.8.2

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://www.jtl-software.com/de/security/shop-maintenance-mode vendor-advisory