CVE-2021-3915— Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
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I. Basic Information for CVE-2021-3915
Vulnerability Information
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Vulnerability Title
Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack
Source: NVD (National Vulnerability Database)
Vulnerability Description
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
BookStack 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BookStack是BookStackApp（Bookstackapp）团队的一套开源的使用PHP和Laravel构建wiki文档的平台。 bookstack存在代码问题漏洞，该漏洞源于软件中的controller.php缺少对于文件类型的限制，攻击者可以上传任意类型的危险文件。
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 | bookstackapp/bookstack | unspecified ~ 21.10.3 | - |
II. Public POCs for CVE-2021-3915
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://huntr.dev/bounties/fcb65f2d-257a-46f4-bac9-f6ded5649079x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-3915
IV. Related Vulnerabilities
Same product: bookstackapp/bookstack
- CVE-2023-4624
Server-Side Request Forgery (SSRF) in bookstackapp/bookstack - CVE-2022-0877
Cross-site Scripting (XSS) - Stored in bookstackapp/bookstac - CVE-2021-4194
Improper Access Control in bookstackapp/bookstack - CVE-2021-4119
Improper Access Control in bookstackapp/bookstack - CVE-2021-3944
Cross-Site Request Forgery (CSRF) in bookstackapp/bookstack
Same vendor: bookstackapp
- CVE-2026-5484
BookStackApp BookStack Chapter Export ExportFormatter.php ch - CVE-2023-4624
Server-Side Request Forgery (SSRF) in bookstackapp/bookstack - CVE-2022-0877
Cross-site Scripting (XSS) - Stored in bookstackapp/bookstac - CVE-2021-4194
Improper Access Control in bookstackapp/bookstack - CVE-2021-4119
Improper Access Control in bookstackapp/bookstack
Same weakness: CWE-434
- CVE-2021-47943
TextPattern CMS 4.8.7 Remote Code Execution via File Upload - CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme - CVE-2026-41517
Emlog: Remote Code Execution via Malicious Plugin Upload - CVE-2026-6692
Slider Revolution 7.0.0 - 7.0.10 - Authenticated (Subscriber - CVE-2026-41587
CI4MS: Unrestricted PHP File Upload via Theme Installation L
V. Comments for CVE-2021-3915
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