CVE-2021-21221
MEDIUMCVSS 6.5/10EPSS 1.57%
Last modified
CVE-2021-21221 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Insufficient validation of untrusted input in Mojo in Google Chrome prior to 90.0.4430.72 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page.. EPSS estimates a 1.57% chance of exploitation in the next 30 days.
Description
Insufficient validation of untrusted input in Mojo in Google Chrome prior to 90.0.4430.72 allowed a remote attacker who had compromised the renderer process to leak cross-origin data 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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chrome | < 90.0.4430.72 | |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.htmlRelease Notes, Third Party Advisory
- https://crbug.com/1195333Third Party Advisory
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
- https://www.debian.org/security/2021/dsa-4906Third Party Advisory
- https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.htmlRelease Notes, Third Party Advisory
- https://crbug.com/1195333Third Party Advisory
- https://security.gentoo.org/glsa/202104-08Third Party Advisory
- https://www.debian.org/security/2021/dsa-4906Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21221?
Insufficient validation of untrusted input in Mojo in Google Chrome prior to 90.0.4430.72 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page.
How severe is CVE-2021-21221?
CVE-2021-21221 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21221?
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.
Related CVEs from 2021
- CVE-2021-21216Inappropriate implementation in Autofill in Google Chrome pr…6.5
- CVE-2021-21217Uninitialized data in PDFium in Google Chrome prior to 90.0.…5.5
- CVE-2021-21218Uninitialized data in PDFium in Google Chrome prior to 90.0.…5.5
- CVE-2021-21219Uninitialized data in PDFium in Google Chrome prior to 90.0.…5.5
- CVE-2021-2122Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
- CVE-2021-21220Insufficient validation of untrusted input in V8 in Google C…8.8
- CVE-2021-21222Heap buffer overflow in V8 in Google Chrome prior to 90.0.44…6.5
- CVE-2021-21223Integer overflow in Mojo in Google Chrome prior to 90.0.4430…9.6
- CVE-2021-21224Type confusion in V8 in Google Chrome prior to 90.0.4430.85 …8.8
- CVE-2021-21225Out of bounds memory access in V8 in Google Chrome prior to …8.8
- CVE-2021-21226Use after free in navigation in Google Chrome prior to 90.0.…9.6
- CVE-2021-21227Insufficient data validation in V8 in Google Chrome prior to…8.8
Are you affected by CVE-2021-21221?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST