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CVE-2021-23393— Open Redirect

Quick assessment

Affected
n/a Flask-Unchained
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.

Flask-Unchained是开源的一个 Flask 扩展、一个可插拔的应用程序工厂和一组可选的“包”，它们共同为Flask 及其扩展生态系统创建了一个现代的、完全集成的、高度可定制的 Web 框架。 Flask-Unchained 0.9.0之前版本存在安全漏洞，该漏洞源于使用 _validate_redirect_url 函数时，可以通过提供多个反斜杠（例如 \evil.com/path）绕过 URL 验证并将用户重定向到任意 URL。只有当使用了除Werkzeug之外的另一个WSGI服务器，或者使

CVSS 5.4 · Medium EPSS 0.72% · P51
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I. Basic Information for CVE-2021-23393

Vulnerability Information
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Vulnerability Title
Open Redirect
Source: CVE Program / CVE List V5
Vulnerability Description
This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Flask-Unchained 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flask-Unchained是开源的一个 Flask 扩展、一个可插拔的应用程序工厂和一组可选的“包”，它们共同为Flask 及其扩展生态系统创建了一个现代的、完全集成的、高度可定制的 Web 框架。 Flask-Unchained 0.9.0之前版本存在安全漏洞，该漏洞源于使用 _validate_redirect_url 函数时，可以通过提供多个反斜杠（例如 \evil.com/path）绕过 URL 验证并将用户重定向到任意 URL。只有当使用了除Werkzeug之外的另一个WSGI服务器，或者使
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
- Flask-Unchained unspecified ~ 0.9.0 -

II. Public POCs for CVE-2021-23393

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III. Intelligence Information for CVE-2021-23393

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Patches & Fixes for CVE-2021-23393 (1)

Vendor Advisories for CVE-2021-23393 (1)

Same Patch Batch · n/a · 2021-06-10 · 52 CVEs total

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CVE-2021-34539 AMP 输入验证错误漏洞
CVE-2019-25046 Cerberus FTP Server Enterprise 跨站脚本漏洞
CVE-2021-20293 Red Hat Resteasy 跨站脚本漏洞
CVE-2021-21735 ZTE ZXHN H168N 信息泄露漏洞
CVE-2021-21736 ZTE ZXHN HS562 访问控制错误漏洞
CVE-2021-20081 ZOHO ManageEngine ServiceDesk Plus 安全漏洞
CVE-2021-31658 TP-Link TL-SG2005和TP-Link TL-SG2008 输入验证错误漏洞
CVE-2021-31659 Tp-link TP-Link TL-SG2005和TP-Link TL-SG2008 跨站请求伪造漏洞
CVE-2020-24662 SmartStream Transaction Lifecycle Management 跨站脚本漏洞
CVE-2021-23023 F5 BIG-IP Edge Gateway代码问题漏洞
CVE-2021-34555 OpenDMARC 代码问题漏洞
CVE-2021-31927 Annex Cloud Loyalty Experience Platform 安全漏洞
CVE-2021-31538 LANCOM R&S Unified Firewalls 路径遍历漏洞
CVE-2021-34546 NetSetMan Pro 授权问题漏洞
CVE-2021-23022 F5 BIG-IP Edge Gateway 安全漏洞
CVE-2020-24668 Trace Financial Crest Bridge 跨站脚本漏洞
CVE-2020-24663 Trace Financial CRESTBridge 跨站脚本漏洞
CVE-2020-24671 Trace Financial CRESTBridge SQL注入漏洞

Showing top 20 of 52 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: n/a

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