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CVE-2021-4296— w3c Unicorn ValidatorNuMessage.java ValidatorNuMessage cross site scripting

Quick assessment

Affected
w3c Unicorn
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.

Unicorn是World Wide Web Consortium开源的一个验证器。通过执行各种检查来帮助人们提高网页的质量。 World Wide Web Consortium Unicorn存在跨站脚本漏洞，该漏洞源于对参数message的错误操作导致跨站点脚本编写。

CVSS 3.5 · Low EPSS 0.52% · P42
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I. Basic Information for CVE-2021-4296

Vulnerability Information
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Vulnerability Title
w3c Unicorn ValidatorNuMessage.java ValidatorNuMessage cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as problematic, has been found in w3c Unicorn. This issue affects the function ValidatorNuMessage of the file src/org/w3c/unicorn/response/impl/ValidatorNuMessage.java. The manipulation of the argument message leads to cross site scripting. The attack may be initiated remotely. The name of the patch is 51f75c31f7fc33859a9a571311c67ae4e95d9c68. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-217019.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Vulnerability Title
World Wide Web Consortium Unicorn 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unicorn是World Wide Web Consortium开源的一个验证器。通过执行各种检查来帮助人们提高网页的质量。 World Wide Web Consortium Unicorn存在跨站脚本漏洞，该漏洞源于对参数message的错误操作导致跨站点脚本编写。
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
w3c Unicorn n/a -

II. Public POCs for CVE-2021-4296

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III. Intelligence Information for CVE-2021-4296

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Patches & Fixes for CVE-2021-4296 (2)

Vendor Advisories for CVE-2021-4296 (2)

IV. Related Vulnerabilities

Same vendor: w3c
Same weakness: CWE-79

V. Comments for CVE-2021-4296

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