CVE-2018-21238

Name: CVE-2018-21238
Creator: NVD / NIST
Published: 2020-06-04T17:15:10.793+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.04%

Last modified Jun 17, 2026

CVE-2018-21238 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Foxit PhantomPDF before 8.3.7. It allows memory consumption via an ArrayBuffer(0xfffffffe) call.. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

An issue was discovered in Foxit PhantomPDF before 8.3.7. It allows memory consumption via an ArrayBuffer(0xfffffffe) call.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.04%

59.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Foxitsoftware	Phantompdf	< 8.3.7

References

https://www.foxitsoftware.com/support/security-bulletins.phpVendor Advisory
https://www.foxitsoftware.com/support/security-bulletins.phpVendor Advisory

Timeline

Published: Jun 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-21238?

An issue was discovered in Foxit PhantomPDF before 8.3.7. It allows memory consumption via an ArrayBuffer(0xfffffffe) call.

How severe is CVE-2018-21238?

CVE-2018-21238 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.

How do I fix CVE-2018-21238?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-21238?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST