CVE-2021-30558
CVSS v3
8.8
HIGH
EPSS Score
11.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Insufficient policy enforcement in content security policy in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chrome security severity: Medium)
Technical details
- Published
- 2023-01-02
Frequently asked questions
What is CVE-2021-30558?
Insufficient policy enforcement in content security policy in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chrome security severity: Medium)
Is CVE-2021-30558 actively exploited?
Active exploitation of CVE-2021-30558 has not been confirmed. Its EPSS score was 11.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-30558?
CVE-2021-30558 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-30558 affecting your environment?
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