CVE-2026-103905 Unauthenticated Plugin Safe Mode Toggle Vulnerability in JTL-Shop
Unauthenticated attackers can toggle plugin safe mode, disabling critical integrations and causing a shop-wide denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103905?
CVE-2026-103905 is a high-severity missing authorization vulnerability in JTL-Software GmbH JTL-Shop, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-103905?
How do I fix CVE-2026-103905?
No fix has been published for CVE-2026-103905 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-103905 being exploited?
There is no known exploitation of CVE-2026-103905 in the wild and no public exploit code.
Sources
Also known as GHSA-xvw9-2xw4-g33x.