CVE-2021-38193: Ammonia Project Ammonia

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

An issue was discovered in the ammonia crate before 3.1.0 for Rust. XSS can occur because the parsing differences for HTML, SVG, and MathML are mishandled, a similar issue to CVE-2020-26870.

Affected products

• Ammonia Project Ammonia: before 3.1.0 (fixed in 3.1.0)

Published 2021-08-08. Last modified 2026-06-17.