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CVE-2021-30633: Google Chromium Indexed DB API Use-After-Free Vulnerability

criticalknown exploitedCVE-2021-30633
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Googleproduct: ChromiumOther
What
The vulnerability is a use-after-free that may allow a sandbox escape via a crafted HTML page.
Who is affected
Users of web browsers utilizing Chromium, including Google Chrome, Microsoft Edge, and Opera.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of the affected browsers.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-30633

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-30633coverage & exploitation statusNVD · CVE.org

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