CVEs / CVE-2021-30533
CVE-2021-30533: Google Chromium PopupBlocker Security Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 27 Jun 2022
- medium 6.5 CVSS 3.1 (NVD)
- EPSS 16.7% chance of exploitation in the next 30 days, higher than 97% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Google Chrome | from unspecified, before 91.0.4472.77 | 91.0.4472.77 |
Exploitation
| In CISA KEV since | 27 Jun 2022 |
|---|---|
| Due date for US federal agencies | 18 Jul 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NScored by NVD |
|---|---|
| Weakness | CWE-863 |
References
- CVE-2021-30533 on NVD
- CVE-2021-30533 in the CISA KEV catalog
- CVE-2021-30533 on OSV
- https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html Release Notes, Vendor Advisory
- https://crbug.com/1145553 Exploit, Issue Tracking, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/ Mailing List, Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/ Mailing List, Release Notes
- https://security.gentoo.org/glsa/202107-06 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30533 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.