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CVE-2026-90848— Governikus AusweisApp StartPAOSResponse cross site scripting

Quick assessment

Affected
Governikus AusweisApp
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.

在 Governikus AusweisApp 2.5.4 及以下版本中已发现一个安全缺陷。受影响的是组件 StartPAOSResponse Handler 中某个未知功能。对参数 ResultMessage 的操纵可能导致跨站点脚本（XSS）漏洞，该攻击可远程发起。升级到 2.5.5 版本可以解决此问题，建议升级受影响的组件。该 CVE 由供应商申请登记。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-90848

Vulnerability Information
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Vulnerability Title
Governikus AusweisApp StartPAOSResponse cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in Governikus AusweisApp up to 2.5.4. Affected is an unknown function of the component StartPAOSResponse Handler. Executing a manipulation of the argument ResultMessage can lead to cross site scripting. The attack can be launched remotely. Upgrading to version 2.5.5 is able to address this issue. It is recommended to upgrade the affected component. This CVE was requested by the vendor.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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
Governikus AusweisApp 2.5.0 cpe:2.3:a:governikus:ausweisapp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90848

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-90848

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Vendor Pages for CVE-2026-90848 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-90848

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