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Fencer Vulns
critical 9.8

CVE-2019-9850 json

Insufficient url validation allowing LibreLogo script execution

published 2019-08-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-19206

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a feature where documents can specify that pre-installed scripts can be executed on various document script events such as mouse-over, etc. Protection was added, to address CVE-2019-9848, to block calling LibreLogo from script event handers. However an insufficient url validation vulnerability in LibreOffice allowed malicious to bypass that protection and again trigger calling LibreLogo from script event handlers. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

Patch / fix

  • Document Foundation LibreOffice 6.2.6
  • libreoffice Debian 14, Debian 13, Debian 12 1:6.3.0-1

debian advisories DEBIAN-CVE-2019-9850

  • libreoffice Ubuntu 16.04 LTS 1:5.1.6~rc2-0ubuntu1~xenial9
  • libreoffice Ubuntu 18.04 LTS 1:6.0.7-0ubuntu0.18.04.9

ubuntu advisories UBUNTU-CVE-2019-9850

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

  • libreoffice RHEL 8 1:6.0.6.1-20.el8
  • autocorr-af RHEL 8 1:6.0.6.1-20.el8
  • autocorr-bg RHEL 8 1:6.0.6.1-20.el8
  • autocorr-ca RHEL 8 1:6.0.6.1-20.el8
  • autocorr-cs RHEL 8 1:6.0.6.1-20.el8
  • autocorr-da RHEL 8 1:6.0.6.1-20.el8
  • autocorr-de RHEL 8 1:6.0.6.1-20.el8
  • autocorr-en RHEL 8 1:6.0.6.1-20.el8

red hat advisories RHSA-2020:1598RHSA-2020:1151

  • libreoffice SLE Workstation Extension 15 SP1 6.2.7.1-8.10.1
  • libreoffice SLED 12 SP4, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP4 6.2.7.1-43.56.3
  • libreoffice SLE Workstation Extension 15 6.2.6.2-3.21.1

suse advisories SUSE-SU-2019:2402-1SUSE-SU-2019:2401-1SUSE-SU-2019:2231-1

  • libreoffice openSUSE Tumbleweed 7.1.5.2-3.13
  • libreoffice openSUSE Leap 15.1 6.2.7.1-lp151.3.6.1
  • libreoffice openSUSE Leap 15.0 6.2.6.2-lp150.2.16.1

opensuse advisories openSUSE-SU-2024:10983-1openSUSE-SU-2019:2183-1openSUSE-SU-2019:2057-1

  • libreoffice Alpine 3.10 6.2.6.2-r0
  • libreoffice Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 6.3.0.4-r0

alpine advisories ALPINE-CVE-2019-9850

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2019-9850 updated cvss 7.8

libreoffice: Insufficient URL validation allowing LibreLogo script execution

  • Red Hat Enterprise Linux 6 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +60 more
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) libreoffice-sdk 6.0.6.1-20.el8, libreoffice-x11 6.0.6.1-20.el8, libreoffice-gtk2 6.0.6.1-20.el8 Red Hat Enterprise Linux AppStream (v. 8) autocorr-af 6.0.6.1-20.el8, autocorr-bg 6.0.6.1-20.el8, autocorr-ca 6.0.6.1-20.el8, autocorr-cs 6.0.6.1-20.el8, autocorr-da 6.0.6.1-20.el8, autocorr-de 6.0.6.1-20.el8, +96 more
    fixed: vendor fix RHSA-2020:1598
  • Red Hat Enterprise Linux Client (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +51 more Red Hat Enterprise Linux Client Optional (v. 7) libreoffice 5.3.6.1-24.el7, libreoffice-bsh 5.3.6.1-24.el7, libreoffice-sdk 5.3.6.1-24.el7, libreoffice-glade 5.3.6.1-24.el7, libreoffice-rhino 5.3.6.1-24.el7, libreoffice-help-ar 5.3.6.1-24.el7, +48 more Red Hat Enterprise Linux Server Optional (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +104 more Red Hat Enterprise Linux Workstation (v. 7) autocorr-af 5.3.6.1-24.el7, autocorr-bg 5.3.6.1-24.el7, autocorr-ca 5.3.6.1-24.el7, autocorr-cs 5.3.6.1-24.el7, autocorr-da 5.3.6.1-24.el7, autocorr-de 5.3.6.1-24.el7, +51 more Red Hat Enterprise Linux Workstation Optional (v. 7) libreoffice 5.3.6.1-24.el7, libreoffice-bsh 5.3.6.1-24.el7, libreoffice-sdk 5.3.6.1-24.el7, libreoffice-glade 5.3.6.1-24.el7, libreoffice-rhino 5.3.6.1-24.el7, libreoffice-help-ar 5.3.6.1-24.el7, +48 more
    fixed: vendor fix RHSA-2020:1151

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

2.93% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Document Foundation LibreOffice

Classification

Weakness
  • CWE-20 Improper Input Validation

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.