Cross-site Scripting in showdoc

MEDIUM 5.4CVE-2021-4172 · GHSA-7x22-pmw5-66mq · Published 22/01/2022 · updated 17/06/2026

In short

CVE-2021-4172 is a MEDIUM (CVSS 5.4) vulnerability affecting showdoc/showdoc, showdoc (showdoc).
Chance of exploitation in the next 30 days (EPSS): 0.64%, higher than 50.8% of all vulnerabilities.
Fix: update to 2.10.2 or later.

Package	Affected versions	Patched versions
showdoc/showdoc Packagist	`< 2.10.2`	`2.10.2`
showdoc showdoc	`< 2.10.2`	`2.10.2`

Stored XSS via upload attachment with format .svg in File Library.

NVD description

Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.

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Package

Affected versions

Patched versions

Packagist

< 2.10.2

2.10.2

< 2.10.2

2.10.2

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