Use After Free in Foxit Pdf Reader
CVE-2021-21831
A use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.3.37598. 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.
Vulnerability class: Use-After-Free
EPSS: 0.045 (90.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Foxit Pdf_reader — versions 10.1.3.37598
- N/a Foxit — versions Foxit Reader 10.1.3.37598
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-21831?
- CVE-2021-21831 is a high-severity vulnerability in Foxit Pdf Reader, classified under Use After Free. CVSS score: 8.8/10. Published 2021-08-05.
- How severe is CVE-2021-21831?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21831 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.