Showdoc File Upload Vulnerability

CRITICAL 9.8CVE-2021-41745 · GHSA-4286-h47h-m5v6 · Published 22/10/2021 · updated 17/06/2026

In short

CVE-2021-41745 is a CRITICAL (CVSS 9.8) vulnerability affecting showdoc/showdoc, showdoc (showdoc).
Chance of exploitation in the next 30 days (EPSS): 1.4%, higher than 72.3% of all vulnerabilities.
Fix: update to 2.8.5 or later.

Package	Affected versions	Patched versions
showdoc/showdoc Packagist	`< 2.8.5`	`2.8.5`
showdoc showdoc	`= 2.8.3`	No fix yet

A file upload vulnerability exists in Showdoc 2.8.3, which can be exploited by an attacker to gain server privileges.

NVD description

ShowDoc 2.8.3 ihas a file upload vulnerability, where attackers can use the vulnerability to obtain server permissions.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

Packagist

< 2.8.5

2.8.5

= 2.8.3

No fix yet

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