CVE-2021-21133: Insufficient policy enforcement in Downloads

Reference Links

• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html (Advisory)
• https://crbug.com/1157743
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21133

Parent vulnerabilities

(Appears in the following advisories)

• 8963246051762193641

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-21117
• CVE-2021-21118
• CVE-2021-21119
• CVE-2021-21120
• CVE-2021-21121
• CVE-2021-21122
• CVE-2021-21123
• CVE-2021-21124
• CVE-2021-21125
• CVE-2020-16044
• CVE-2021-21126
• CVE-2021-21127
• CVE-2021-21128
• CVE-2021-21129
• CVE-2021-21130
• CVE-2021-21131
• CVE-2021-21132
• CVE-2021-21134
• CVE-2021-21135
• CVE-2021-21136
• CVE-2021-21137
• CVE-2021-21138
• CVE-2021-21139
• CVE-2021-21140
• CVE-2021-21141

Frequently Asked Questions

• What is the severity of CVE-2021-21133?

  CVE-2021-21133 is classified as a medium severity vulnerability affecting Google Chrome and Microsoft Edge Chromium.

• How do I fix CVE-2021-21133?

  To fix CVE-2021-21133, update Google Chrome to version 88.0.4324.96 or later, or Microsoft Edge Chromium to version 88.0.705.50 or later.

• Which versions of Google Chrome are affected by CVE-2021-21133?

  Google Chrome versions prior to 88.0.4324.96 are affected by CVE-2021-21133.

• Which versions of Microsoft Edge Chromium are impacted by CVE-2021-21133?

  Microsoft Edge Chromium versions prior to 88.0.705.50 are impacted by CVE-2021-21133.

• What type of attack does CVE-2021-21133 enable?

  CVE-2021-21133 enables an attacker to persuade a user to download files that can bypass navigation restrictions.