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CVE-2021-21337— URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService

Quick assessment

Affected
zopefoundation Products.PluggableAuthService
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jens Vagelpohl Products.PluggableAuthService是 （Jens Vagelpohl）开源的一个应用程序。该产品定义了一个可完全插入的用户文件夹，供所有Zope网站使用。 Products.PluggableAuthService before version 2.6.0 存在安全漏洞，该漏洞源于一个打开的重定向漏洞。恶意制作的登录表单和登录功能链接可能会将浏览器重定向到另一个网站。

CVSS 5.7 · Medium EPSS 8.44% · P95

Public Exploits 1

ExploitDB · 1 EDB-49930 [webapps]

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-21337

Vulnerability Information
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Vulnerability Title
URL Redirection to Untrusted Site ('Open Redirect') in Products.PluggableAuthService
Source: CVE Program / CVE List V5
Vulnerability Description
Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability. A maliciously crafted link to the login form and login functionality could redirect the browser to a different website. The problem has been fixed in version 2.6.1. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to `2.6.1` and re-run the buildout, or if you used `pip` simply do `pip install "Products.PluggableAuthService>=2.6.1".
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Jens Vagelpohl Products.PluggableAuthService 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jens Vagelpohl Products.PluggableAuthService是 （Jens Vagelpohl）开源的一个应用程序。该产品定义了一个可完全插入的用户文件夹，供所有Zope网站使用。 Products.PluggableAuthService before version 2.6.0 存在安全漏洞，该漏洞源于一个打开的重定向漏洞。恶意制作的登录表单和登录功能链接可能会将浏览器重定向到另一个网站。
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
zopefoundation Products.PluggableAuthService < 2.6.1 -

II. Public POCs for CVE-2021-21337

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III. Intelligence Information for CVE-2021-21337

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Patches & Fixes for CVE-2021-21337 (1)

Vendor Advisories for CVE-2021-21337 (1)

Other References for CVE-2021-21337 (1)

IV. Related Vulnerabilities

Same product: Products.PluggableAuthService
Same vendor: zopefoundation
Same weakness: CWE-601

V. Comments for CVE-2021-21337

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