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CVE-2021-47936— OpenCATS 0.9.4 Remote Code Execution via Resume Upload

Quick assessment

Affected
Opencats OpenCATS
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.

OpenCats是OpenCats开源的一套开源的招聘流程管理系统。 OpenCats 0.9.4版本存在访问控制错误漏洞，该漏洞源于远程代码执行漏洞，允许未经身份验证的攻击者通过上传伪装成简历附件的恶意PHP文件执行任意命令，攻击者可以通过职业申请端点上传PHP有效载荷，并通过向上传目录中的文件发送POST请求执行系统命令。

CVSS 9.8 · Critical EPSS 0.66% · P49

Affected Version Matrix 1

VendorProduct Version RangeStatus
Opencats OpenCATS ≤ 0.9.4 affected
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I. Basic Information for CVE-2021-47936

Vulnerability Information
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Vulnerability Title
OpenCATS 0.9.4 Remote Code Execution via Resume Upload
Source: CVE Program / CVE List V5
Vulnerability Description
OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by uploading malicious PHP files disguised as resume attachments. Attackers can upload PHP payloads through the careers job application endpoint and execute system commands via POST requests to the uploaded file in the upload directory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
OpenCats 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenCats是OpenCats开源的一套开源的招聘流程管理系统。 OpenCats 0.9.4版本存在访问控制错误漏洞，该漏洞源于远程代码执行漏洞，允许未经身份验证的攻击者通过上传伪装成简历附件的恶意PHP文件执行任意命令，攻击者可以通过职业申请端点上传PHP有效载荷，并通过向上传目录中的文件发送POST请求执行系统命令。
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
Opencats OpenCATS 0 ~ 0.9.4 -

II. Public POCs for CVE-2021-47936

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III. Intelligence Information for CVE-2021-47936

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Exploits & Public PoCs for CVE-2021-47936 (1)

News Coverage for CVE-2021-47936 (1)

Vendor Pages for CVE-2021-47936 (2)

IV. Related Vulnerabilities

Same product: OpenCATS
Same vendor: Opencats
Same weakness: CWE-306

V. Comments for CVE-2021-47936

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