What’s Vulnerable › Vulnerabilities

CVE-2020-13803

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-04 · updated 2026-06-17
• Weakness: CWE-347

Description

An issue was discovered in Foxit PhantomPDF Mac and Foxit Reader for Mac before 4.0. It allows signature validation bypass via a modified file or a file with non-standard signatures.

Affected products

• Foxit PhantomPDF: before 4.0 — fixed in 4.0
• Foxit Reader: before 4.0 — fixed in 4.0

How to fix

Upgrade to a fixed version: Foxit PhantomPDF 4.0; Foxit Reader 4.0. Check the vendor advisory for mitigations.

References

• https://www.foxitsoftware.com/support/security-bulletins.php
• https://www.foxitsoftware.com/support/security-bulletins.php

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