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Vulnerability DatabaseCVE-2025-0520

CVE-2025-0520: 
PHP vulnerability analysis and mitigation

Overview

CVE-2025-0520 is an unrestricted file upload vulnerability affecting ShowDoc versions before 2.8.7. The vulnerability was discovered and disclosed in January 2025, with the CVE being officially published on April 29, 2025 (NVD).

Technical details

The vulnerability is caused by improper validation of file extension in ShowDoc, which allows execution of arbitrary PHP code. The vulnerability has been assigned a CVSS v4.0 score of 9.4 (CRITICAL) with the vector string 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. The weakness is categorized as CWE-434 (Unrestricted Upload of File with Dangerous Type) (NVD).

Impact

The vulnerability allows attackers to execute arbitrary PHP code on the affected system through file upload functionality, potentially leading to remote code execution. This could result in complete system compromise and unauthorized access to sensitive data (NVD).

Mitigation and workarounds

Users are advised to upgrade to ShowDoc version 2.8.7 or later which contains the fix for this vulnerability. The fix includes proper validation of file extensions and implementation of authentication checks (GitHub).

Additional resources

Source: This report was generated using AI

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