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CVE-2021-3987— Improper Access Control in janeczku/calibre-web

Quick assessment

Affected
janeczku janeczku/calibre-web
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.

Calibre-Web是Jan B个人开发者的一款用于浏览、阅读和下载Calibre数据库中电子书的Web应用程序。 Calibre-Web存在访问控制错误漏洞，该漏洞源于shelf.py中的create_shelf方法未验证用户是否具有创建公共书架所需的权限。

AI Predicted 5.3 Difficulty: Easy EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-3987

Vulnerability Information
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Vulnerability Title
Improper Access Control in janeczku/calibre-web
Source: CVE Program / CVE List V5
Vulnerability Description
An improper access control vulnerability exists in janeczku/calibre-web. The affected version allows users without public shelf permissions to create public shelves. The vulnerability is due to the `create_shelf` method in `shelf.py` not verifying if the user has the necessary permissions to create a public shelf. This issue can lead to unauthorized actions being performed by users.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Calibre-Web 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Calibre-Web是Jan B个人开发者的一款用于浏览、阅读和下载Calibre数据库中电子书的Web应用程序。 Calibre-Web存在访问控制错误漏洞，该漏洞源于shelf.py中的create_shelf方法未验证用户是否具有创建公共书架所需的权限。
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
janeczku janeczku/calibre-web unspecified ~ latest -

II. Public POCs for CVE-2021-3987

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III. Intelligence Information for CVE-2021-3987

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Patches & Fixes for CVE-2021-3987 (1)

Same Patch Batch · janeczku · 2024-11-15 · 3 CVEs total

CVE-2021-3988 Cross-site Scripting (XSS) in janeczku/calibre-web
CVE-2021-3986 Information Disclosure in janeczku/calibre-web

IV. Related Vulnerabilities

Same product: janeczku/calibre-web
Same vendor: janeczku
Same weakness: CWE-284

V. Comments for CVE-2021-3987

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