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Fencer Vulns
medium 6.5

CVE-2020-6506 json

Android WebView Universal Cross-site Scripting

published 2020-07-22 6 y ago modified 2026-06-17 4 mo ago also GHSA-36j3-xxf7-4pqg , EUVD-2020-1404

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Insufficient policy enforcement in WebView in Google Chrome on Android prior to 83.0.4103.106 allowed a remote attacker to bypass site isolation via a crafted HTML page.

Patch / fix

  • npm react-native-webview 11.0.0
  • Google Chrome 83.0.4103.106
  • chromium Debian 14, Debian 13, Debian 12 83.0.4103.106-1

debian advisories DEBIAN-CVE-2020-6506

  • chromium-browser Ubuntu 16.04 LTS 84.0.4147.105-0ubuntu0.16.04.1
  • chromium-browser Ubuntu 18.04 LTS 84.0.4147.105-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2020-6506

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

  • chromium-browser RHEL 6 EXTRAS 83.0.4103.106-1.el6_10

red hat advisories RHSA-2020:2643

  • chromium openSUSE Tumbleweed 93.0.4577.82-1.1
  • chromium openSUSE Tumbleweed 113.0.5672.92-1.1
  • chromium openSUSE Leap 15.2 83.0.4103.116-lp152.2.3.1
  • chromium Package Hub 15 SP1 83.0.4103.106-bp151.3.88.1
  • chromium openSUSE Leap 15.1 83.0.4103.106-lp151.2.101.1

opensuse advisories openSUSE-SU-2024:10681-1openSUSE-SU-2024:12948-1openSUSE-SU-2020:0893-1openSUSE-SU-2020:0856-1openSUSE-SU-2020:0845-1

  • chromium Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 83.0.4103.116-r0

alpine advisories ALPINE-CVE-2020-6506

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

  • chromium Arch Linux 83.0.4103.106-1

arch linux advisories AVG-1190

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-2020-6506 updated cvss 8.8

chromium-browser: Insufficient policy enforcement in WebView

  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser 83.0.4103.106-1.el6_10 Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser 83.0.4103.106-1.el6_10 Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser 83.0.4103.106-1.el6_10 Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser 83.0.4103.106-1.el6_10
    fixed: vendor fix RHSA-2020:2643

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

3.72% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm react-native-webview
<11.0.0
11.0.0

Affected products

  • Google Chrome

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-863 Incorrect Authorization
Technology feeds

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.