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CVE-2025-43954

Quick assessment

Affected
Quasar QMarkdown
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.

QMarkdown是Quasar Framework开源的一个Quasar UI应用程序扩展，用于显示内联标记。 QMarkdown 2.0.5之前版本存在安全漏洞，该漏洞源于即使设置了no-html，仍可能通过标头导致跨站脚本攻击。

CVSS 4.9 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2025-43954

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
QMarkdown (aka quasar-ui-qmarkdown) before 2.0.5 allows XSS via headers even when when no-html is set.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/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
Vulnerability Title
QMarkdown 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QMarkdown是Quasar Framework开源的一个Quasar UI应用程序扩展，用于显示内联标记。 QMarkdown 2.0.5之前版本存在安全漏洞，该漏洞源于即使设置了no-html，仍可能通过标头导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Quasar QMarkdown 0 ~ 2.0.5 -

II. Public POCs for CVE-2025-43954

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III. Intelligence Information for CVE-2025-43954

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Patches & Fixes for CVE-2025-43954 (2)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2025-43954

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