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TI-2026-73907 Aliases CVE-2026-103905GHSA-xvw9-2xw4-g33x

Unauthenticated plugin safe mode toggle in JTL-Shop enables denial of service

Priority MEDIUM 44CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

JTL-Shop from 5.3.0 before 5.6.5, from 5.7.0 before 5.7.5 and from 5.8.0 before 5.8.2 is affected. The authentication middleware of the administration backend processes the plugin safe mode toggle on the admin logout route before checking whether the user is authenticated, which is missing authentication for a critical function (CWE-306). An unauthenticated remote attacker can switch plugin safe mode on and off with a single request, which deactivates all installed plugins, including payment and shipping integrations, and causes a shop-wide denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00531 45th percentileScored 2026-11-07
Fix Fixed JTL-Shop (JTL-Software GmbH): 5.6.5, 5.7.5, 5.8.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JTL-Software GmbHJTL-Shop5.3.0 to before 5.6.5; 5.7.0 to before 5.7.5; 5.8.0 to before 5.8.25.6.5, 5.7.5, 5.8.2Patch availableCNA
  • JTL-Shop VendorJTL-Software GmbH Affected 5.3.0 to before 5.6.5; 5.7.0 to before 5.7.5; 5.8.0 to before 5.8.2 Fixed in 5.6.5, 5.7.5, 5.8.2 Patch available CNA

Remediation

Update JTL-Shop to 5.6.5, 5.7.5 or 5.8.2, depending on the release line in use. The sources list no fixed version for other releases.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA JTL-Shop (JTL-Software GmbH) Fixed in 5.6.5, 5.7.5, 5.8.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    JTL-Software JTL-Shop 5.6.5, 5.7.5, 5.8.2

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-73906 Stored cross-site scripting in JTL-Shop consent statisticsPriority LOW 39
    Show all 2 records →

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-103905
  2. 2026-10-14 Alias added: GHSA-xvw9-2xw4-g33x
  3. 2026-10-14 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-39268 JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer CVSS 4.0CRITICAL 9.3
  • TI-2026-73906 Stored cross-site scripting in JTL-Shop consent statistics CVSS 4.0HIGH 8.6
  • TI-2010-00659 SQL injection vulnerability in druckansicht.php in JTL-Shop 2 allows remote attackers to… CVSS 2.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences