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CVE-2020-6506

Android WebView Universal Cross-site Scripting

6.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

3.72%Up 2.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

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.

Record
CVE-2020-6506
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-6506
Updated
2026-11-02
EUVDEUVD-2020-1404 No score

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.

Record
EUVD-2020-1404
Updated
2026-11-03
GitHub AdvisoriesGHSA-36j3-xxf7-4pqg 6.5

Android WebView Universal Cross-site Scripting

A universal cross-site scripting (UXSS) vulnerability, CVE-2020-6506 (https://crbug.com/1083819), has been identified in the Android WebView system component, which allows cross-origin iframes to execute arbitrary JavaScript in the top-level document. This vulnerability affects React Native apps which use a react-native-webview that allows navigation to arbitrary URLs, and when that app runs on systems with an Android WebView version prior to 83.0.4103.106.

Pending mitigation

Ensure users update their Android WebView system component via the Google Play Store to 83.0.4103.106 or higher to avoid this UXSS. 'react-native-webview' is working on a mitigation but it could take some time.

References

https://alesandroortiz.com/articles/uxss-android-webview-cve-2020-6506/

Record
GHSA-36j3-xxf7-4pqg
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness
CWE-79, CWE-863
Updated
2026-11-02
OSVALPINE-CVE-2020-6506 6.5

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.

Record
ALPINE-CVE-2020-6506
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-03
OSV 6.5

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.

Record
CVE-2020-6506
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
Show 9 moreShow less
OSVDEBIAN-CVE-2020-6506 6.5

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.

Record
DEBIAN-CVE-2020-6506
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVGHSA-36j3-xxf7-4pqg 6.5

Android WebView Universal Cross-site Scripting

A universal cross-site scripting (UXSS) vulnerability, CVE-2020-6506 (https://crbug.com/1083819), has been identified in the Android WebView system component, which allows cross-origin iframes to execute arbitrary JavaScript in the top-level document. This vulnerability affects React Native apps which use a react-native-webview that allows navigation to arbitrary URLs, and when that app runs on systems with an Android WebView version prior to 83.0.4103.106.

Pending mitigation

Ensure users update their Android WebView system component via the Google Play Store to 83.0.4103.106 or higher to avoid this UXSS. 'react-native-webview' is working on a mitigation but it could take some time.

References

https://alesandroortiz.com/articles/uxss-android-webview-cve-2020-6506/

Record
GHSA-36j3-xxf7-4pqg
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness
CWE-79, CWE-863
Updated
2026-11-02
OSVRHSA-2020:2643 8.8

Red Hat Security Advisory: chromium-browser security update

Record
RHSA-2020:2643
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-6506 6.5

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.

Record
UBUNTU-CVE-2020-6506
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2020:0845-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Update to version 83.0.4103.106 (boo#1173029):

  • CVE-2020-6505: Use after free in speech
  • CVE-2020-6506: Insufficient policy enforcement in WebView
  • CVE-2020-6507: Out of bounds write in V8
  • Enforce to not use system borders bsc#1173063
Record
openSUSE-SU-2020:0845-1
Updated
2026-11-02
OSVopenSUSE-SU-2020:0856-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Update to version 83.0.4103.106 (boo#1173029):

  • CVE-2020-6505: Use after free in speech
  • CVE-2020-6506: Insufficient policy enforcement in WebView
  • CVE-2020-6507: Out of bounds write in V8
  • Enforce to not use system borders bsc#1173063

This update was imported from the openSUSE:Leap:15.1:Update update project.

Record
openSUSE-SU-2020:0856-1
Updated
2026-11-02
OSVopenSUSE-SU-2020:0893-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Chromium was updated to 83.0.4103.116 (boo#1173251):

  • CVE-2020-6509: Use after free in extensions

Chromium was updated to 83.0.4103.106 (boo#1173029):

  • CVE-2020-6505: Use after free in speech
  • CVE-2020-6506: Insufficient policy enforcement in WebView
  • CVE-2020-6507: Out of bounds write in V8

Other fixes:

  • Add patch to work with new ffmpeg wrt boo#1173292:
  • Add multimedia fix for disabled location and also try one additional patch from Debian on the same issue boo#1173107
  • Disable wayland integration on 15.x boo#1173187 boo#1173188 boo#1173254
  • Enforce to not use system borders boo#1173063
Record
openSUSE-SU-2020:0893-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10681-1 No score

chromedriver-93.0.4577.82-1.1 on GA media

These are all security issues fixed in the chromedriver-93.0.4577.82-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10681-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:12948-1 No score

ungoogled-chromium-113.0.5672.92-1.1 on GA media

These are all security issues fixed in the ungoogled-chromium-113.0.5672.92-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12948-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
react-native-webview
npm
 through 10.10.2
11.0.0
chromium
Alpine:v3.12
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.13
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.14
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.15
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.16
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.17
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.18
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.19
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.20
 before 83.0.4103.116-r0
83.0.4103.116-r0
Show 18 moreShow less
Affected packages
PackageAffectedFixed
chromium
Alpine:v3.21
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.22
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.23
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Alpine:v3.24
 before 83.0.4103.116-r0
83.0.4103.116-r0
chromium
Debian:12
 before 83.0.4103.106-1
83.0.4103.106-1
chromium
Debian:13
 before 83.0.4103.106-1
83.0.4103.106-1
chromium
Debian:14
 before 83.0.4103.106-1
83.0.4103.106-1
chromium
Debian:10
From an advisory covering 69 CVEs
 before 83.0.4103.116-1~deb10u1, plus listed versions
73.0.3683.75-174.0.3729.108-175.0.3770.10-175.0.3770.80-175.0.3770.90-1
Show 30 moreShow less
76.0.3809.100-176.0.3809.100-1~deb10u176.0.3809.62-176.0.3809.71-176.0.3809.87-176.0.3809.87-278.0.3904.108-178.0.3904.108-1~deb10u178.0.3904.87-178.0.3904.97-178.0.3904.97-1~deb10u179.0.3945.130-179.0.3945.130-1~deb10u179.0.3945.130-279.0.3945.56-179.0.3945.79-180.0.3987.106-180.0.3987.116-180.0.3987.122-180.0.3987.122-280.0.3987.132-180.0.3987.132-1~deb10u180.0.3987.149-180.0.3987.149-1~deb10u180.0.3987.162-180.0.3987.162-1~deb10u181.0.4044.62-181.0.4044.92-183.0.4103.106-183.0.4103.83-1
83.0.4103.116-1~deb10u1
react-native-webview
npm
 before 11.0.0
11.0.0
chromium-browser
Red Hat:rhel_extras:6
From an advisory covering 3 CVEs
 before 0:83.0.4103.106-1.el6_10
0:83.0.4103.106-1.el6_10
chromium-browser-debuginfo
Red Hat:rhel_extras:6
From an advisory covering 3 CVEs
 before 0:83.0.4103.106-1.el6_10
0:83.0.4103.106-1.el6_10
chromium-browser
Ubuntu:16.04:LTS
 before 84.0.4147.105-0ubuntu0.16.04.1, plus listed versions
45.0.2454.101-0ubuntu1.120147.0.2526.73-0ubuntu1.121847.0.2526.106-0ubuntu1.122148.0.2564.82-0ubuntu1.122248.0.2564.116-0ubuntu1.1229
Show 45 moreShow less
49.0.2623.87-0ubuntu1.123249.0.2623.108-0ubuntu1.123350.0.2661.102-0ubuntu0.16.04.1.123751.0.2704.79-0ubuntu0.16.04.1.124252.0.2743.116-0ubuntu0.16.04.1.125053.0.2785.143-0ubuntu0.16.04.1.125453.0.2785.143-0ubuntu0.16.04.1.125755.0.2883.87-0ubuntu0.16.04.126356.0.2924.76-0ubuntu0.16.04.126857.0.2987.98-0ubuntu0.16.04.127658.0.3029.81-0ubuntu0.16.04.127758.0.3029.96-0ubuntu0.16.04.127958.0.3029.110-0ubuntu0.16.04.128159.0.3071.109-0ubuntu0.16.04.128959.0.3071.109-0ubuntu0.16.04.129160.0.3112.78-0ubuntu0.16.04.129360.0.3112.113-0ubuntu0.16.04.129861.0.3163.79-0ubuntu0.16.04.130061.0.3163.100-0ubuntu0.16.04.130662.0.3202.62-0ubuntu0.16.04.130862.0.3202.75-0ubuntu0.16.04.131362.0.3202.89-0ubuntu0.16.04.131562.0.3202.94-0ubuntu0.16.04.131763.0.3239.84-0ubuntu0.16.04.163.0.3239.132-0ubuntu0.16.04.164.0.3282.119-0ubuntu0.16.04.164.0.3282.140-0ubuntu0.16.04.164.0.3282.167-0ubuntu0.16.04.165.0.3325.181-0ubuntu0.16.04.166.0.3359.139-0ubuntu0.16.04.366.0.3359.181-0ubuntu0.16.04.167.0.3396.99-0ubuntu0.16.04.268.0.3440.75-0ubuntu0.16.04.168.0.3440.106-0ubuntu0.16.04.169.0.3497.81-0ubuntu0.16.04.170.0.3538.67-0ubuntu0.16.04.170.0.3538.77-0ubuntu0.16.04.170.0.3538.110-0ubuntu0.16.04.171.0.3578.80-0ubuntu0.16.04.171.0.3578.98-0ubuntu0.16.04.172.0.3626.119-0ubuntu0.16.04.172.0.3626.121-0ubuntu0.16.04.173.0.3683.75-0ubuntu0.16.04.173.0.3683.86-0ubuntu0.16.04.174.0.3729.169-0ubuntu0.16.04.1
84.0.4147.105-0ubuntu0.16.04.1
chromium-browser
Ubuntu:18.04:LTS
 before 84.0.4147.105-0ubuntu0.18.04.1, plus listed versions
61.0.3163.100-0ubuntu1.137862.0.3202.62-0ubuntu0.17.10.138062.0.3202.89-0ubuntu1.138662.0.3202.94-0ubuntu1.138863.0.3239.84-0ubuntu1
Show 38 moreShow less
63.0.3239.108-0ubuntu164.0.3282.119-0ubuntu164.0.3282.140-0ubuntu164.0.3282.167-0ubuntu165.0.3325.146-0ubuntu165.0.3325.181-0ubuntu166.0.3359.139-0ubuntu0.18.04.366.0.3359.181-0ubuntu0.18.04.167.0.3396.99-0ubuntu0.18.04.168.0.3440.75-0ubuntu0.18.04.168.0.3440.106-0ubuntu0.18.04.169.0.3497.81-0ubuntu0.18.04.170.0.3538.67-0ubuntu0.18.04.170.0.3538.77-0ubuntu0.18.04.170.0.3538.110-0ubuntu0.18.04.171.0.3578.80-0ubuntu0.18.04.171.0.3578.98-0ubuntu0.18.04.172.0.3626.119-0ubuntu0.18.04.172.0.3626.121-0ubuntu0.18.04.173.0.3683.75-0ubuntu0.18.04.173.0.3683.86-0ubuntu0.18.04.174.0.3729.169-0ubuntu0.18.04.175.0.3770.90-0ubuntu0.18.04.175.0.3770.142-0ubuntu0.18.04.176.0.3809.87-0ubuntu0.18.04.176.0.3809.100-0ubuntu0.18.04.177.0.3865.90-0ubuntu0.18.04.178.0.3904.70-0ubuntu0.18.04.278.0.3904.97-0ubuntu0.18.04.178.0.3904.108-0ubuntu0.18.04.179.0.3945.79-0ubuntu0.18.04.179.0.3945.130-0ubuntu0.18.04.180.0.3987.87-0ubuntu0.18.04.180.0.3987.149-0ubuntu0.18.04.180.0.3987.163-0ubuntu0.18.04.181.0.4044.122-0ubuntu0.18.04.181.0.4044.138-0ubuntu0.18.04.183.0.4103.61-0ubuntu0.18.04.1
84.0.4147.105-0ubuntu0.18.04.1
chromium
openSUSE:Leap 15.1
From an advisory covering 3 CVEs
 before 83.0.4103.106-lp151.2.101.1
83.0.4103.106-lp151.2.101.1
chromium
SUSE:Package Hub 15 SP1
From an advisory covering 3 CVEs
 before 83.0.4103.106-bp151.3.88.1
83.0.4103.106-bp151.3.88.1
chromium
openSUSE:Leap 15.2
From an advisory covering 4 CVEs
 before 83.0.4103.116-lp152.2.3.1
83.0.4103.116-lp152.2.3.1
chromium
openSUSE:Tumbleweed
From an advisory covering 1081 CVEs
 before 93.0.4577.82-1.1
93.0.4577.82-1.1
chromium
openSUSE:Tumbleweed
From an advisory covering 2310 CVEs
 before 113.0.5672.92-1.1
113.0.5672.92-1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-6506 is a medium vulnerability (CVSS 6.5) in Google Chrome, published June 22, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.72%, the 89th percentile. Fixed in react-native-webview 11.0.0.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 13 versions and 2,165 references. The JSON record has them.

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