CVE-2020-26210— Cross-Site Scripting in BookStack
Quick assessment
Affected
BookStackApp BookStack
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.
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之前版本存在跨站脚本漏洞，该漏洞源于WEB应用缺少对客户端数据的正确验证，该漏洞可造成目标网站可以执行不受信任的JavaScript代码，进一步可能造成破坏数据库中数据的危害。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2020-26210
Vulnerability Information
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Vulnerability Title
Cross-Site Scripting in BookStack
Source: CVE Program / CVE List V5
Vulnerability Description
In BookStack before version 0.30.4, a user with permissions to edit a page could add an attached link which would execute untrusted JavaScript code when clicked by a viewer of the page. Dangerous content may remain in the database after this update. If you think this could have been exploited the linked advisory provides a SQL query to test. As a workaround, 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 version 0.30.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/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
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之前版本存在跨站脚本漏洞，该漏洞源于WEB应用缺少对客户端数据的正确验证，该漏洞可造成目标网站可以执行不受信任的JavaScript代码，进一步可能造成破坏数据库中数据的危害。
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 |
|---|---|---|---|---|
| BookStackApp | BookStack | < 0.30.4 | - |
|
II. Public POCs for CVE-2020-26210
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2020-26210 (1)
Vendor Advisories for CVE-2020-26210 (1)
Security Blog Posts for CVE-2020-26210 (1)
-
https://bookstackapp.com/blog/beta-release-v0-30-4/ x_refsource_MISC
Other References for CVE-2020-26210 (1)
-
https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4 x_refsource_MISC
IV. Related Vulnerabilities
Same product: BookStack
Same vendor: BookStackApp
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CVE-2021-4194
Improper Access Control in bookstackapp/bookstack
Same weakness: CWE-79
-
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Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting v -
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V. Comments for CVE-2020-26210
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