What’s Vulnerable › Vulnerabilities
CVE-2026-103905: Unauthenticated Plugin Safe Mode Toggle Vulnerability in JTL-Shop
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-14 · updated 2026-10-16
- Weakness: CWE-306
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
- JTL-Software GmbH JTL-Shop: from 5.3.0 before 5.6.5; from 5.7.0 before 5.7.5; from 5.8.0 before 5.8.2 — fixed in 5.6.5, 5.7.5, 5.8.2
How to fix
Upgrade to a fixed version: JTL-Software GmbH JTL-Shop 5.6.5, 5.7.5, 5.8.2. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-103905 or the next vulnerability affects your stack