CVE-2021-30682

MEDIUMNVD 5.55.5—Elevated

5.5

A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious application may be able to leak sensitive user information.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 51.1%
KEV: Not listed

Published

September 8, 2021

Last Modified

November 21, 2024

References (10)

product-security@applehttps://support.apple.com/en-us/HT212528
product-security@applehttps://support.apple.com/en-us/HT212529
product-security@applehttps://support.apple.com/en-us/HT212532
product-security@applehttps://support.apple.com/en-us/HT212533
product-security@applehttps://support.apple.com/en-us/HT212534
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212528
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212529
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212532
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212533
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212534

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	webkitgtk4-0:2.48.3-2.el7_9	2025-07-07	redhat
redhat	webkit2gtk3-0:2.32.3-2.el8	2021-11-09	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCthreatnix/csp-playground
First seen Oct 15, 2021
CSP Playground for CVE-2021-30682
Open source ↗

Frequently asked(5)

What is CVE-2021-30682?

CVE-2021-30682 is a medium vulnerability published on September 8, 2021. A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious application may be able to leak sensitive user information.

When was CVE-2021-30682 disclosed?

CVE-2021-30682 was first published in the National Vulnerability Database on September 8, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-30682 actively exploited?

CVE-2021-30682 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-30682?

CVE-2021-30682 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-30682?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-30682, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-30682

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