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CVE-2025-0520 — Vulnerability in showdoc/showdoc — CVE Details

CRITICAL

ShowDoc unrestricted file upload vulnerability

Published April 29, 2025Updated November 5, 2025Source: osv

Summary

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.

Advisory Timeline

  • First published April 29, 2025 (531 days ago).
  • Last revised November 5, 2025 — 190 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update showdoc/showdoc to 2.8.7 or later
composer require "showdoc/showdoc:^2.8.7"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: packagist (1).

PackageEcosystemAffectedFixed In
showdoc/showdoc
packagist
v1.0.0, v1.0.1, v1.0.2, v1.0.3 (+103 more)2.8.7

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-434
    Unrestricted File UploadMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.9 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

References

Frequently Asked Questions

What is CVE-2025-0520?
ShowDoc unrestricted file upload vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.9/10).
How do I check if my project is affected by CVE-2025-0520?
CVE-2025-0520 affects showdoc/showdoc. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-0520 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.9

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-6jmr-r7p6-f5wr

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