CVE-2021-21133
MEDIUMCVSS 6.5/10EPSS 3.04%
Last modified
CVE-2021-21133 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Insufficient policy enforcement in Downloads in Google Chrome prior to 88.0.4324.96 allowed an attacker who convinced a user to download files to bypass navigation restrictions via a crafted HTML page.. EPSS estimates a 3.04% chance of exploitation in the next 30 days.
Description
Insufficient policy enforcement in Downloads in Google Chrome prior to 88.0.4324.96 allowed an attacker who convinced a user to download files to bypass navigation restrictions via a crafted HTML page.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chrome | < 88.0.4324.96 | |
| Microsoft | Edge Chromium | < 88.0.705.50 |
References
- https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.htmlRelease Notes, Vendor Advisory
- https://crbug.com/1157743Permissions Required, Third Party Advisory
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21133Third Party Advisory
- https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.htmlRelease Notes, Vendor Advisory
- https://crbug.com/1157743Permissions Required, Third Party Advisory
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21133Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21133?
Insufficient policy enforcement in Downloads in Google Chrome prior to 88.0.4324.96 allowed an attacker who convinced a user to download files to bypass navigation restrictions via a crafted HTML page.
How severe is CVE-2021-21133?
CVE-2021-21133 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.04% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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- CVE-2021-21136Insufficient policy enforcement in WebView in Google Chrome …6.5
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Are you affected by CVE-2021-21133?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST