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CVE-2021-36539

Quick assessment

Affected
n/a n/a
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Canvas LMS是Instructure开源的一个开源学习管理系统。 Instruction Canvas LMS存在安全漏洞，该漏洞源于未正确拒绝访问锁定或未发布的文件。

AI Predicted 5.4 Difficulty: Easy EPSS 0.87% · P56

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-36539

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Instructure Canvas LMS didn't properly deny access to locked/unpublished files when the unprivileged user access the DocViewer based file preview URL (canvadoc_session_url).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Instruction Canvas LMS 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canvas LMS是Instructure开源的一个开源学习管理系统。 Instruction Canvas LMS存在安全漏洞，该漏洞源于未正确拒绝访问锁定或未发布的文件。
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
- n/a n/a -

II. Public POCs for CVE-2021-36539

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 9383 chars
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Full executable POC code
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POC zip download
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III. Intelligence Information for CVE-2021-36539

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Other References for CVE-2021-36539 (2)

Same Patch Batch · n/a · 2023-01-26 · 20 CVEs total

CVE-2022-46966 Revenue Collection System SQL注入漏洞
CVE-2023-24170 Tenda AC18 缓冲区错误漏洞
CVE-2023-24169 Tenda AC18 缓冲区错误漏洞
CVE-2023-24167 Tenda AC18 缓冲区错误漏洞
CVE-2023-24166 Tenda AC18 缓冲区错误漏洞
CVE-2023-24165 Tenda AC18 缓冲区错误漏洞
CVE-2023-24164 Tenda AC18 缓冲区错误漏洞
CVE-2023-22971 Hughes Network Systems HX200 跨站脚本漏洞
CVE-2022-47951 OpenStack 路径遍历漏洞
CVE-2022-46967 Revenue Collection System 安全漏洞
CVE-2020-22327 HFish 跨站脚本漏洞
CVE-2022-45770 AdGuard for Windows 安全漏洞
CVE-2022-44297 SiteServer CMS SQL注入漏洞
CVE-2022-44264 Dentsply Sirona Sidexis 代码问题漏洞
CVE-2022-44263 Dentsply Sirona Sidexis 安全漏洞
CVE-2021-41989 Qlik QlikView 安全漏洞
CVE-2021-41988 Qlik NPrinting Designer 安全漏洞
CVE-2021-36686 YMFE YApi 跨站脚本漏洞
CVE-2020-22452 phpMyAdmin SQL注入漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2021-36539

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