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

Quick assessment

Affected
JTL-Software GmbH JTL-Shop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

JTL-Shop 管理后端的身份验证中间件在处理插件安全模式切换时，存在一处逻辑缺陷：该操作在 admin 退出登录（logout）路由上被执行，且发生在确认请求用户是否已进行身份验证之前。因此，未经身份验证的远程攻击者可以利用此缺陷，随意开启或关闭商店的插件安全模式。这将导致所有已安装插件及其功能（例如支付和物流集成）被禁用，从而引发整个商店范围的拒绝服务（DoS）。该攻击仅需发送一次 HTTP 请求即可实现，并可自动化地针对大量部署实例实施。

CVSS 7.5 · High EPSS 0.53% · P44

Affected Version Matrix 3

VendorProduct Version RangeStatus
JTL-Software GmbH JTL-Shop 5.3.0< 5.6.5 affected
5.7.0< 5.7.5 affected
5.8.0< 5.8.2 affected
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I. Basic Information for CVE-2026-103905

Vulnerability Information
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Vulnerability Title
Unauthenticated Plugin Safe Mode Toggle Vulnerability in JTL-Shop
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
JTL-Software GmbH JTL-Shop 5.3.0 ~ 5.6.5 -

II. Public POCs for CVE-2026-103905

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III. Intelligence Information for CVE-2026-103905

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Other References for CVE-2026-103905 (1)

IV. Related Vulnerabilities

Same product: JTL-Shop
Same vendor: JTL-Software GmbH
Same weakness: CWE-306

V. Comments for CVE-2026-103905

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