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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0195
Remote Code Execution Vulnerability in ShowDoc

Original Issue Date:April 17, 2026

Severity Rating: CRITICAL

Software Affected

  • ShowDoc versions prior to 2.8.7

Overview

Remote Code Execution vulnerability has been identified in ShowDoc which could allow a remote attacker to upload arbitrary files on the targeted system.

Target Audience: 
All end-user organizations and individuals using ShowDoc.

Risk Assessment:
High risk of remote code execution, unauthorized access and complete system compromise.

Impact Assessment:
Potential for full system takeover, unauthorized access, remote code execution.

Description

ShowDoc is an open-source web-based document management and collaboration service.

Remote Code Execution vulnerability exists in ShowDoc due to unrestricted file upload that stems from improper validation of file extension, which could allow an attacker to upload arbitrary PHP files and achieve remote code execution on the server with specially crafted requests.

Successful exploitation of this vulnerability could allow a remote attacker to gain unauthorized access and/or execute arbitrary code on the targeted system.

Solution

Apply appropriate updates as mentioned by the vendor:
https://thehackernews.com/2026/04/showdoc-rce-flaw-cve-2025-0520-actively.html

Vendor Information

ShowDoc
https://www.showdoc.com.cn/help-en/16882

References

ShowDoc
https://thehackernews.com/2026/04/showdoc-rce-flaw-cve-2025-0520-actively.html

CVE Name
CVE-2025-0520

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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