How severe is CVE-2019-20823?

CVE-2019-20823 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-20823 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20823?

CVE-2019-20823 affects Foxitsoftware Phantompdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20823?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-20823 published?

CVE-2019-20823 was published on 2020-06-04 and last updated on 2026-06-17.

CVE-2019-20823

CVE-2019-20823 is a high-severity vulnerability in Foxitsoftware Phantompdf with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Foxitsoftware Phantompdf
Published: 2020-06-04
Last modified: 2026-06-17

Description

An issue was discovered in Foxit PhantomPDF before 8.3.11. It has a buffer overflow because a looping correction does not occur after JavaScript updates Field APs.

Frequently asked questions

What is CVE-2019-20823?: An issue was discovered in Foxit PhantomPDF before 8.3.11. It has a buffer overflow because a looping correction does not occur after JavaScript updates Field APs.
How severe is CVE-2019-20823?: CVE-2019-20823 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-20823 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20823?: CVE-2019-20823 affects Foxitsoftware Phantompdf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20823?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-20823 published?: CVE-2019-20823 was published on 2020-06-04 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:*

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