CVE-2018-20312

Name: CVE-2018-20312
Creator: NVD / NIST
Published: 2021-01-07T17:15:12.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2018-20312 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Foxit Reader before 9.5, and PhantomPDF before 8.3.10 and 9.x before 9.5, has a proxyDoAction race condition that can cause a stack-based buffer overflow or an out-of-bounds read, a different issue than CVE-2018-20310 because of a different opcode.. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

Foxit Reader before 9.5, and PhantomPDF before 8.3.10 and 9.x before 9.5, has a proxyDoAction race condition that can cause a stack-based buffer overflow or an out-of-bounds read, a different issue than CVE-2018-20310 because of a different opcode.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.82%

52.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Foxitsoftware	Phantompdf	< 8.3.10
Foxitsoftware	Phantompdf	>= 9.0, < 9.5
Foxitsoftware	Reader	< 9.5

References

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

Timeline

Published: Jan 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20312?

How severe is CVE-2018-20312?

CVE-2018-20312 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20312?

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-2018-20312?

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

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Source: NVD / NIST