TI-2021-10928 Aliases CVE-2021-30533 GHSA-83cg-29pr-h246

Incorrect authorization in Google Chrome

CRITICAL 86Exploited in the wildCWE-863Published 2021-06-07 · Updated 2025-10-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-863.

Summary

Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.

Why it matters now

Exploitation Active In CISA KEV since 2022-06-27CISA due date 2022-07-18

EPSS 0.16742 97th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed Chrome (Google): 91.0.4472.77

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Active
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Google	Chrome	before 91.0.4472.77	91.0.4472.77	Patch available	CNA

Chrome VendorGoogle Affected before 91.0.4472.77 Fixed in 91.0.4472.77 Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:google:chrome::::::::	before 91.0.4472.77	Vulnerable	Google
cpe:2.3:o:fedoraproject:fedora:33:::::::*	33	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:::::::*	34	Vulnerable	Fedoraproject

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* Versions before 91.0.4472.77 Vulnerable ·Google
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Fix · CNA Chrome (Google) Fixed in 91.0.4472.77

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2021-06-07
Google Chrome 91.0.4472.77
20 records Highest priority Priority CRITICAL 1 CRITICAL, 11 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2021-10923 Use after free in Google ChromePriority MEDIUM 41
- TI-2021-10917 Use after free in Google ChromePriority MEDIUM 41
- TI-2021-10916 Out-of-bounds write in Google ChromePriority MEDIUM 41
Show all 20 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2022-06-27 Added to CISA KEV
2026-10-02 Threatist record created from CVE-2021-30533
2026-10-03 Alias added: GHSA-83cg-29pr-h246

References

Exploit 1

https://crbug.com/1145553

Advisory 4

TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
TI-2024-07390 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
TI-2024-04898 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
TI-2024-04600 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
TI-2024-04346 Use after free in Google Chrome KEVCVSS 3.1CRITICAL 9.6
TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6

See all 7586 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences