What is CVE-2018-10303?

CVE-2018-10303 is a high-severity vulnerability in Foxitsoftware Foxit Reader, classified under Use After Free. CVSS score: 8.8/10. Published 2018-04-23.

How severe is CVE-2018-10303?

High severity. CVSS v3 base score is 8.8 out of 10.

Use After Free in Foxitsoftware Foxit Reader

CVE-2018-10303

A use-after-free in Foxit Reader before 9.1 and PhantomPDF before 9.1 allows remote attackers to execute arbitrary code, aka iDefense ID V-y0nqfutlf3.

Vulnerability class: Use-After-Free

Published 2018-04-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

srcincite.io/advisories/src-2018-0020/ (Third Party Advisory)
www.foxitsoftware.com/support/security-bulletins.php (Vendor Advisory)

Frequently asked questions

What is CVE-2018-10303?: CVE-2018-10303 is a high-severity vulnerability in Foxitsoftware Foxit Reader, classified under Use After Free. CVSS score: 8.8/10. Published 2018-04-23.
How severe is CVE-2018-10303?: High severity. CVSS v3 base score is 8.8 out of 10.