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CVE-2026-103904— Stored XSS 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.

The public consent endpoint of JTL-Shop accepts arbitrary consent names from unauthenticated visitors without validating them against the configured consent items. These names are stored in the consent statistics and rendered without output encoding in the adm

CVSS 9.3 · Critical

Affected Version Matrix 3

VendorProduct Version RangeStatus
JTL-Software GmbH JTL-Shop 5.4.0< 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-2026-103904

Vulnerability Information

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Vulnerability Title
Stored XSS Vulnerability in JTL-Shop
Source: CVE Program / CVE List V5
Vulnerability Description
The public consent endpoint of JTL-Shop accepts arbitrary consent names from unauthenticated visitors without validating them against the configured consent items. These names are stored in the consent statistics and rendered without output encoding in the administration backend. An unauthenticated remote attacker can thereby inject script code that is executed in the browser session of an administrator viewing the consent statistics page, allowing actions to be performed with the administrator's privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
JTL-Software GmbH JTL-Shop 5.4.0 ~ 5.6.5 -

II. Public POCs for CVE-2026-103904

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III. Intelligence Information for CVE-2026-103904

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Other References for CVE-2026-103904 (1)

IV. Related Vulnerabilities

Same product: JTL-Shop
Same vendor: JTL-Software GmbH
Same weakness: CWE-79

V. Comments for CVE-2026-103904

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