CVE-2021-21228
Insufficient policy enforcement in extensions in Google Chrome prior to 90.0.4430.93 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a
02 Description
Insufficient policy enforcement in extensions in Google Chrome prior to 90.0.4430.93 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.06% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 64.4% of scored records. A rank, not a probability.
- NVD base score
- 4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-04-30 20:15Z5 YR AGO
- Last updated
- 2024-08-03 18:09Z2 YR AGO
- Reserved
- 2020-12-21
- Assigning CNA
- Chrome
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-863Incorrect AuthorizationClass
- Data version
- 5.1
- Document digest
- 195c89c1595be454036475fe329e048d40821548a97988d867d8f2c7fee30d9e
05 Affected products
06 References
- chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html
- crbug.comhttps://crbug.com/1139156
- security.gentoo.orgGLSA-202104-08https://security.gentoo.org/glsa/202104-08
- www.debian.orgDSA-4911https://www.debian.org/security/2021/dsa-4911
- lists.fedoraproject.orgFEDORA-2021-c3754414e7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
- lists.fedoraproject.orgFEDORA-2021-ff893e12c5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
- lists.fedoraproject.orgFEDORA-2021-35d2bb4627https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
07 Fixed in
Arch Linux
- chromium Fixed in 90.0.4430.93-1
- vivaldi Fixed in 3.8.2259.37-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- chromium Fixed in 90.0.4430.93-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- chromium Fixed in 90.0.4430.93-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- chromium Fixed in 90.0.4430.93-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- chromium-browser Fixed in 90.0.4430.93-0ubuntu0.18.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.