Skip to content
Fencer Vulns
high 8.8

CVE-2019-8503 json

A logic issue was addressed with improved validation.

published 2019-12-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-17893

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

A logic issue was addressed with improved validation. This issue is fixed in iOS 12.2, tvOS 12.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. A malicious website may be able to execute scripts in the context of another website.

Patch / fix

  • Apple iOS iOS 12.2
  • Apple tvOS tvOS 12.2
  • Apple Safari Safari 12.1
  • Apple iTunes for Windows iTunes 12.9.4 for Windows
  • Apple iCloud for Windows iCloud for Windows 7.11
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.24.1-1

debian advisories DEBIAN-CVE-2019-8503

  • webkit2gtk Ubuntu 18.04 LTS 2.22.6-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-8503

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

  • webkitgtk4 RHEL 7 2.22.7-2.el7
  • webkitgtk4-jsc RHEL 7 2.22.7-2.el7
  • webkitgtk4-plugin-process-gtk2 RHEL 7 2.22.7-2.el7

red hat advisories RHBA-2019:2261

  • webkit2gtk3 SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +12 more 2.24.1-2.41.5
  • webkit2gtk3 SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 2.24.1-3.24.1

suse advisories SUSE-SU-2019:1155-1SUSE-SU-2019:1137-1

  • webkit2gtk3 openSUSE Leap 15.0 2.24.1-lp150.2.19.1

opensuse advisories openSUSE-SU-2019:1374-1

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-2019-8503 updated cvss 6.3

webkitgtk: logic issue leads to code execution

  • Red Hat Enterprise Linux 6 webkitgtk
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtk
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) webkitgtk4 2.22.7-2.el7, webkitgtk4-jsc 2.22.7-2.el7, webkitgtk4-plugin-process-gtk2 2.22.7-2.el7 Red Hat Enterprise Linux Client Optional (v. 7) webkitgtk4-doc 2.22.7-2.el7, webkitgtk4-devel 2.22.7-2.el7, webkitgtk4-debuginfo 2.22.7-2.el7, webkitgtk4-jsc-devel 2.22.7-2.el7 Red Hat Enterprise Linux ComputeNode (v. 7) webkitgtk4 2.22.7-2.el7, webkitgtk4-jsc 2.22.7-2.el7, webkitgtk4-plugin-process-gtk2 2.22.7-2.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) webkitgtk4-doc 2.22.7-2.el7, webkitgtk4-devel 2.22.7-2.el7, webkitgtk4-debuginfo 2.22.7-2.el7, webkitgtk4-jsc-devel 2.22.7-2.el7 Red Hat Enterprise Linux Server (v. 7) webkitgtk4 2.22.7-2.el7, webkitgtk4-jsc 2.22.7-2.el7, webkitgtk4-plugin-process-gtk2 2.22.7-2.el7 Red Hat Enterprise Linux Server Optional (v. 7) webkitgtk4-doc 2.22.7-2.el7, webkitgtk4-devel 2.22.7-2.el7, webkitgtk4-debuginfo 2.22.7-2.el7, webkitgtk4-jsc-devel 2.22.7-2.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) webkitgtk4 2.22.7-2.el7, webkitgtk4-jsc 2.22.7-2.el7, webkitgtk4-plugin-process-gtk2 2.22.7-2.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) webkitgtk4-doc 2.22.7-2.el7
    fixed: vendor fix RHBA-2019:2261
  • Red Hat Enterprise Linux 8 webkit2gtk3, webkit2gtk3-jsc, webkit2gtk3-plugin-process-gtk2
    not affected: vulnerable code not present

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

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • Apple iOS
  • Apple tvOS
  • Apple Safari
  • Apple iTunes for Windows
  • Apple iCloud for Windows

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.