What is CVE-2020-18839?

CVE-2020-18839 is a medium-severity vulnerability in Freedesktop Poppler, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-08-22.

How severe is CVE-2020-18839?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Freedesktop Poppler

CVE-2020-18839

Buffer Overflow vulnerability in HtmlOutputDev::page in poppler 0.75.0 allows attackers to cause a denial of service.

Vulnerability class: Buffer Overflow

Published 2023-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Freedesktop Poppler — versions 0.75.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

gitlab.freedesktop.org/poppler/poppler/issues/742 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-18839?: CVE-2020-18839 is a medium-severity vulnerability in Freedesktop Poppler, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-08-22.
How severe is CVE-2020-18839?: Medium severity. CVSS v3 base score is 6.5 out of 10.