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CVE-2025-0520— ShowDoc < 2.8.7 Unauthenticated File Upload Remote Code Execution

Quick assessment

Affected
ShowDoc ShowDoc
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.

ShowDoc是star7th个人开发者的一个非常适合IT团队在线共享文档的工具。 ShowDoc 2.8.7之前版本存在代码问题漏洞，该漏洞源于文件扩展名验证不当，可能导致远程代码执行。

CVSS 9.4 · Critical EPSS 2.65% · P85

Public Exploits 1

Nuclei · 1 CVE-2025-0520.yaml [template]

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 1

VendorProduct Version RangeStatus
ShowDoc ShowDoc < 2.8.7 affected
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I. Basic Information for CVE-2025-0520

Vulnerability Information
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Vulnerability Title
ShowDoc < 2.8.7 Unauthenticated File Upload Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
An unrestricted file upload vulnerability in ShowDoc caused by improper validation of file extension allows execution of arbitrary PHP, leading to remote code execution.This issue affects ShowDoc: before 2.8.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
ShowDoc 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ShowDoc是star7th个人开发者的一个非常适合IT团队在线共享文档的工具。 ShowDoc 2.8.7之前版本存在代码问题漏洞，该漏洞源于文件扩展名验证不当，可能导致远程代码执行。
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
ShowDoc ShowDoc 0 ~ 2.8.7 -

II. Public POCs for CVE-2025-0520

# POC Description Source Link Shenlong Link
1 The open-source API documentation tool ShowDoc had a remote code execution vulnerability before version 2.8.7 This vulnerability allowed unauthenticated remote attackers to upload .php files because the image upload function was not authenticated and the file extension validation was improper. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-0520.yaml POC Details
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III. Intelligence Information for CVE-2025-0520

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Patches & Fixes for CVE-2025-0520 (1)

Proof of Concept for CVE-2025-0520 (1)

IV. Related Vulnerabilities

Same product: ShowDoc
Same weakness: CWE-434

V. Comments for CVE-2025-0520

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