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Fencer Vulns
high 7.8

CVE-2020-25559 json

gnuplot 5.5 is affected by double free when executing print_set_output.

published 2020-09-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18243

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

gnuplot 5.5 is affected by double free when executing print_set_output. This may result in context-dependent arbitrary code execution.

Patch / fix

  • gnuplot Debian 14, Debian 13 6.0.0+dfsg1-1

debian advisories DEBIAN-CVE-2020-25559

  • gnuplot Ubuntu Pro 14.04 LTS 4.6.4-2ubuntu0.1~esm1
  • gnuplot Ubuntu Pro 16.04 LTS 4.6.6-3ubuntu0.1+esm1
  • gnuplot Ubuntu Pro 18.04 LTS 5.2.2+dfsg1-2ubuntu1+esm1
  • gnuplot Ubuntu Pro 20.04 LTS 5.2.8+dfsg1-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-25559

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gnuplot SLE Module for Server Applications 15 SP2 5.2.2-3.6.1

suse advisories SUSE-SU-2021:0549-1

  • gnuplot openSUSE Tumbleweed 5.4.2-1.3
  • gnuplot openSUSE Leap 15.2 5.2.2-lp152.6.3.1

opensuse advisories openSUSE-SU-2024:10800-1openSUSE-SU-2021:0345-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-25559 updated cvss 7.8

gnuplot: double free when executing print_set_output may lead to arbitrary code execution

  • Red Hat Enterprise Linux 5 gnuplot Red Hat Enterprise Linux 6 gnuplot, emacs-gnuplot, gnuplot-latex, gnuplot-common, gnuplot-minimal, emacs-gnuplot-el
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 gnuplot, emacs-gnuplot, gnuplot-latex, gnuplot-common, gnuplot-minimal, emacs-gnuplot-el Red Hat Enterprise Linux 8 gnuplot, gnuplot-common
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/gnuplot/bugs/2312/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.