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CVE-2021-30533

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a...

6.5 MediumIn KEVFix available

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

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

16.7%Up 13.3 points since Jun 8, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
CVE-2021-30533
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
Weakness
CWE-863
Updated
2026-11-02
CVE List 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
CVE-2021-30533
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-863
Updated
2026-11-02
EUVDEUVD-2021-17454 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
EUVD-2021-17454
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
GitHub AdvisoriesGHSA-83cg-29pr-h246 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a...

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
GHSA-83cg-29pr-h246
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-863
Updated
2026-11-02
CISA KEV No score

Google Chromium PopupBlocker Security Bypass Vulnerability

Google Chromium PopupBlocker contains an insufficient policy enforcement vulnerability that allows a remote attacker to bypass navigation restrictions via a crafted iframe. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Record
CVE-2021-30533
Weakness
CWE-863
Updated
2026-11-02
OSVALPINE-CVE-2021-30533 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
ALPINE-CVE-2021-30533
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
Show 8 moreShow less
OSV 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
CVE-2021-30533
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
OSVDEBIAN-CVE-2021-30533 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
DEBIAN-CVE-2021-30533
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
OSVUBUNTU-CVE-2021-30533 6.5

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Record
UBUNTU-CVE-2021-30533
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-2021:0825-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Chromium 91.0.4472.77 (boo#1186458):

  • Support Managed configuration API for Web Applications
  • WebOTP API: cross-origin iframe support
  • CSS custom counter styles
  • Support JSON Modules
  • Clipboard: read-only files support
  • Remove webkitBeforeTextInserted & webkitEditableCOntentChanged JS events
  • Honor media HTML attribute for link icon
  • Import Assertions
  • Class static initializer blocks
  • Ergonomic brand checks for private fields
  • Expose WebAssembly SIMD
  • New Feature: WebTransport
  • ES Modules for service workers ('module' type option)
  • Suggested file name and location for the File System Access API
  • adaptivePTime property for RTCRtpEncodingParameters
  • Block HTTP port 10080 - mitigation for NAT Slipstream 2.0 attack
  • Support WebSockets over HTTP/2
  • Support 103 Early Hints for Navigation
  • CVE-2021-30521: Heap buffer overflow in Autofill
  • CVE-2021-30522: Use after free in WebAudio
  • CVE-2021-30523: Use after free in WebRTC
  • CVE-2021-30524: Use after free in TabStrip
  • CVE-2021-30525: Use after free in TabGroups
  • CVE-2021-30526: Out of bounds write in TabStrip
  • CVE-2021-30527: Use after free in WebUI
  • CVE-2021-30528: Use after free in WebAuthentication
  • CVE-2021-30529: Use after free in Bookmarks
  • CVE-2021-30530: Out of bounds memory access in WebAudio
  • CVE-2021-30531: Insufficient policy enforcement in Content Security Policy
  • CVE-2021-30532: Insufficient policy enforcement in Content Security Policy
  • CVE-2021-30533: Insufficient policy enforcement in PopupBlocker
  • CVE-2021-30534: Insufficient policy enforcement in iFrameSandbox
  • CVE-2021-30535: Double free in ICU
  • CVE-2021-21212: Insufficient data validation in networking
  • CVE-2021-30536: Out of bounds read in V8
  • CVE-2021-30537: Insufficient policy enforcement in cookies
  • CVE-2021-30538: Insufficient policy enforcement in content security policy
  • CVE-2021-30539: Insufficient policy enforcement in content security policy
  • CVE-2021-30540: Incorrect security UI in payments
  • Various fixes from internal audits, fuzzing and other initiatives
Record
openSUSE-SU-2021:0825-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:0840-1 No score

Security update for chromium

This update for chromium fixes the following issues:

Chromium 91.0.4472.77 (boo#1186458):

  • Support Managed configuration API for Web Applications
  • WebOTP API: cross-origin iframe support
  • CSS custom counter styles
  • Support JSON Modules
  • Clipboard: read-only files support
  • Remove webkitBeforeTextInserted & webkitEditableCOntentChanged JS events
  • Honor media HTML attribute for link icon
  • Import Assertions
  • Class static initializer blocks
  • Ergonomic brand checks for private fields
  • Expose WebAssembly SIMD
  • New Feature: WebTransport
  • ES Modules for service workers ('module' type option)
  • Suggested file name and location for the File System Access API
  • adaptivePTime property for RTCRtpEncodingParameters
  • Block HTTP port 10080 - mitigation for NAT Slipstream 2.0 attack
  • Support WebSockets over HTTP/2
  • Support 103 Early Hints for Navigation
  • CVE-2021-30521: Heap buffer overflow in Autofill
  • CVE-2021-30522: Use after free in WebAudio
  • CVE-2021-30523: Use after free in WebRTC
  • CVE-2021-30524: Use after free in TabStrip
  • CVE-2021-30525: Use after free in TabGroups
  • CVE-2021-30526: Out of bounds write in TabStrip
  • CVE-2021-30527: Use after free in WebUI
  • CVE-2021-30528: Use after free in WebAuthentication
  • CVE-2021-30529: Use after free in Bookmarks
  • CVE-2021-30530: Out of bounds memory access in WebAudio
  • CVE-2021-30531: Insufficient policy enforcement in Content Security Policy
  • CVE-2021-30532: Insufficient policy enforcement in Content Security Policy
  • CVE-2021-30533: Insufficient policy enforcement in PopupBlocker
  • CVE-2021-30534: Insufficient policy enforcement in iFrameSandbox
  • CVE-2021-30535: Double free in ICU
  • CVE-2021-21212: Insufficient data validation in networking
  • CVE-2021-30536: Out of bounds read in V8
  • CVE-2021-30537: Insufficient policy enforcement in cookies
  • CVE-2021-30538: Insufficient policy enforcement in content security policy
  • CVE-2021-30539: Insufficient policy enforcement in content security policy
  • CVE-2021-30540: Incorrect security UI in payments
  • Various fixes from internal audits, fuzzing and other initiatives
Record
openSUSE-SU-2021:0840-1
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-2024:10977-1 No score

libQt5Pdf5-5.15.6-2.1 on GA media

These are all security issues fixed in the libQt5Pdf5-5.15.6-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10977-1
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
chromium
Alpine:v3.14
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.15
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.16
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.17
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.18
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.19
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.20
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.21
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.22
 before 91.0.4472.77-r0
91.0.4472.77-r0
chromium
Alpine:v3.23
 before 91.0.4472.77-r0
91.0.4472.77-r0
Show 20 moreShow less
Affected packages
PackageAffectedFixed
chromium
Alpine:v3.24
 before 91.0.4472.77-r0
91.0.4472.77-r0
qt5-qtwebengine
Alpine:v3.14
 before 5.15.3_git20211006-r0
5.15.3_git20211006-r0
qt5-qtwebengine
Alpine:v3.15
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.16
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.17
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.18
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.19
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.20
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.21
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.22
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
qt5-qtwebengine
Alpine:v3.23
 before 5.15.3_git20210510-r4
5.15.3_git20210510-r4
chromium
Debian:12
 before 93.0.4577.82-1
93.0.4577.82-1
chromium
Debian:13
 before 93.0.4577.82-1
93.0.4577.82-1
chromium
Debian:14
 before 93.0.4577.82-1
93.0.4577.82-1
chromium-browser
Ubuntu:18.04:LTS
 before 91.0.4472.77-0ubuntu0.18.04.1, 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 45 moreShow less
63.0.3239.108-0ubuntu164.0.3282.119-0ubuntu164.0.3282.140-0ubuntu164.0.3282.167-0ubuntu165.0.3325.146-0ubuntu165.0.3325.181-0ubuntu166.0.3359.139-0ubuntu0.18.04.366.0.3359.181-0ubuntu0.18.04.167.0.3396.99-0ubuntu0.18.04.168.0.3440.75-0ubuntu0.18.04.168.0.3440.106-0ubuntu0.18.04.169.0.3497.81-0ubuntu0.18.04.170.0.3538.67-0ubuntu0.18.04.170.0.3538.77-0ubuntu0.18.04.170.0.3538.110-0ubuntu0.18.04.171.0.3578.80-0ubuntu0.18.04.171.0.3578.98-0ubuntu0.18.04.172.0.3626.119-0ubuntu0.18.04.172.0.3626.121-0ubuntu0.18.04.173.0.3683.75-0ubuntu0.18.04.173.0.3683.86-0ubuntu0.18.04.174.0.3729.169-0ubuntu0.18.04.175.0.3770.90-0ubuntu0.18.04.175.0.3770.142-0ubuntu0.18.04.176.0.3809.87-0ubuntu0.18.04.176.0.3809.100-0ubuntu0.18.04.177.0.3865.90-0ubuntu0.18.04.178.0.3904.70-0ubuntu0.18.04.278.0.3904.97-0ubuntu0.18.04.178.0.3904.108-0ubuntu0.18.04.179.0.3945.79-0ubuntu0.18.04.179.0.3945.130-0ubuntu0.18.04.180.0.3987.87-0ubuntu0.18.04.180.0.3987.149-0ubuntu0.18.04.180.0.3987.163-0ubuntu0.18.04.181.0.4044.122-0ubuntu0.18.04.181.0.4044.138-0ubuntu0.18.04.183.0.4103.61-0ubuntu0.18.04.184.0.4147.105-0ubuntu0.18.04.185.0.4183.83-0ubuntu0.18.04.285.0.4183.121-0ubuntu0.18.04.186.0.4240.75-0ubuntu0.18.04.186.0.4240.198-0ubuntu0.18.04.187.0.4280.66-0ubuntu0.18.04.189.0.4389.82-0ubuntu0.18.04.1
91.0.4472.77-0ubuntu0.18.04.1
chromium
openSUSE:Leap 15.2
From an advisory covering 21 CVEs
 before 91.0.4472.77-lp152.2.98.1
91.0.4472.77-lp152.2.98.1
chromium
SUSE:Package Hub 15 SP3
From an advisory covering 21 CVEs
 before 91.0.4472.77-bp153.2.3.1
91.0.4472.77-bp153.2.3.1
chromium
openSUSE:Leap 15.3
From an advisory covering 21 CVEs
 before 91.0.4472.77-bp153.2.3.1
91.0.4472.77-bp153.2.3.1
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
exploitation
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, NVD, OSV

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

In short

CVE-2021-30533 is a medium vulnerability (CVSS 6.5) in Google Chrome, published June 2, 2021. CISA lists it as known to be exploited, since June 27, 2022. EUVD reports exploitation since June 27, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 16.7%, the 97th percentile. Fixed in chromium 91.0.4472.77-r0.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 3 versions and 2,129 references. The JSON record has them.

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