What is CVE-2020-24999?

CVE-2020-24999 is a high-severity vulnerability in Xpdfreader Xpdf, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-09-03.

How severe is CVE-2020-24999?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-24999 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Xpdfreader Xpdf

CVE-2020-24999

There is an invalid memory access in the function fprintf located in Error.cc in Xpdf 4.0.2. It can be triggered by sending a crafted PDF file to the pdftohtml binary, which allows a remote attacker to cause a Denial of Service (Segmentation fault) or possibly have unspecified other impact.

Vulnerability class: Buffer Overflow

Published 2020-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.8th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Xpdfreader Xpdf — versions 4.0.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

forum.xpdfreader.com/viewtopic.php (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2020-24999?: CVE-2020-24999 is a high-severity vulnerability in Xpdfreader Xpdf, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-09-03.
How severe is CVE-2020-24999?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-24999 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.