Cross-Site Scripting in Qiita-Markdown

MEDIUM 6.1CVE-2021-28796 · GHSA-f2c9-5jqw-3xh3 · Published 18/03/2021 · updated 17/06/2026

In short

CVE-2021-28796 is a MEDIUM (CVSS 6.1) vulnerability affecting qiita-markdown, qiita (increments).
Chance of exploitation in the next 30 days (EPSS): 0.77%, higher than 55.9% of all vulnerabilities.
Fix: update to 0.33.0 or later.

Package	Affected versions	Patched versions
qiita-markdown RubyGems	`< 0.33.0`	`0.33.0`
qiita increments	`< 0.33.0`	`0.33.0`

Increments Qiita-Markdown before 0.33.0 allows XSS in transformers.

NVD description

Increments Qiita::Markdown before 0.33.0 allows XSS in transformers.

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