A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 11.0.0.49893. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick the user to open the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site if the browser plugin extension is enabled.

Related CVEs

CVE-2021-21893

Key Information

GHSA ID

GHSA-cjvq-xvv5-f922

Published

May 24, 2022 10:28 PM

Last Modified

May 24, 2022 10:28 PM

CVSS Score

7.5 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: August 1, 2025 6:44 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.