Overview
Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
https://nvd.nist.gov/vuln/detail/CVE-2021-30633
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-30633 |
| Vendor / Product | Google — Chromium Indexed DB API |
| NVD Published | 2021-10-08 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 9.6 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-416 |
| CISA KEV Added | 2021-11-03 |
| CISA KEV Deadline | 2021-11-17 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2021-11-17.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2021-11-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2021-11-17 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-30633 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |