What’s Vulnerable › Vulnerabilities

CVE-2021-30888

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-601

Description

An information leakage issue was addressed. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1. A malicious website using Content Security Policy reports may be able to leak information via redirect behavior .

Affected products

• Apple Ipad Os: before 14.8.1 — fixed in 14.8.1
• Apple iPadOS: 15.0
• Apple Iphone Os: before 14.8.1; 15.0 — fixed in 14.8.1
• Apple macOS: before 12.0.1 — fixed in 12.0.1
• Apple tvOS: before 15.1 — fixed in 15.1
• Apple watchOS: before 8.1 — fixed in 8.1

How to fix

Upgrade to a fixed version: Apple Ipad Os 14.8.1; Apple Iphone Os 14.8.1; Apple macOS 12.0.1; Apple tvOS 15.1; Apple watchOS 8.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/12/20/6
• https://support.apple.com/en-us/HT212867
• https://support.apple.com/en-us/HT212868
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212874
• https://support.apple.com/en-us/HT212876
• http://www.openwall.com/lists/oss-security/2021/12/20/6
• https://support.apple.com/en-us/HT212867
• https://support.apple.com/en-us/HT212868
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212874
• https://support.apple.com/en-us/HT212876

Get alerted when CVE-2021-30888 or the next vulnerability affects your stack