CVE-2021-28833: Increments Qiita::markdown

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Increments Qiita::Markdown before 0.34.0 allows XSS via a crafted gist link, a different vulnerability than CVE-2021-28796.

Affected products

• Increments Qiita::markdown: before 0.34.0 (fixed in 0.34.0)

Published 2021-06-21. Last modified 2026-06-17.