CVE-2021-21796: Gonitro Nitro Pro

High severity, CVSS 7.8. EPSS: 15.8% chance of exploitation in the next 30 days.

An exploitable use-after-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause an object containing the path to a document to be destroyed and then later reused, resulting in a use-after-free vulnerability, which can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger this vulnerability.

Affected products

• Gonitro Nitro Pro: version 13.31.0.605 only; version 13.33.2.645 only

Published 2021-10-18. Last modified 2026-06-17.