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I. Basic Information for CVE-2020-26211
Vulnerability Information

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Vulnerability Title
Cross-Site Scripting in BookStack
Source: NVD (National Vulnerability Database)
Vulnerability Description
In BookStack before version 0.30.4, a user with permissions to edit a page could insert JavaScript code through the use of `javascript:` URIs within a link or form which would run, within the context of the current page, when clicked or submitted. Additionally, a user with permissions to edit a page could insert a particular meta tag which could be used to silently redirect users to a alternative location upon visit of a page. Dangerous content may remain in the database but will be removed before being displayed on a page. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround without upgrading, page edit permissions could be limited to only those that are trusted until you can upgrade although this will not address existing exploitation of this vulnerability. The issue is fixed in BookStack version 0.30.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
BookStack 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BookStack是BookStackApp团队的一套开源的使用PHP和Laravel构建wiki文档的平台。 BookStack 0.30.4之前版本存在安全漏洞,该漏洞允许攻击者在页面中插入javascript代码或者插入meta标签,进而可能造成对数据库的破坏或者被重定向到某个危险界面。
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
VendorProductAffected VersionsCPESubscribe
BookStackAppBookStack < 0.30.4 -
II. Public POCs for CVE-2020-26211
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III. Intelligence Information for CVE-2020-26211
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