What’s Vulnerable › Vulnerabilities

CVE-2023-27961

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-08 · updated 2026-06-17
• Weakness: CWE-20

Description

Multiple validation issues were addressed with improved input sanitization. This issue is fixed in macOS Ventura 13.3, iOS 16.4 and iPadOS 16.4, iOS 15.7.4 and iPadOS 15.7.4, macOS Monterey 12.6.4, watchOS 9.4, macOS Big Sur 11.7.5. Importing a maliciously crafted calendar invitation may exfiltrate user information.

Affected products

• Apple iPadOS: before 15.7.4; from 16.0 before 16.4 — fixed in 15.7.4, 16.4
• Apple Iphone Os: before 15.7.4; from 16.0 before 16.4 — fixed in 15.7.4, 16.4
• Apple macOS: from 11.0 before 11.7.5; from 12.0 before 12.6.4; from 13.0 before 13.3 — fixed in 11.7.5, 12.6.4, 13.3
• Apple watchOS: before 9.4 — fixed in 9.4

How to fix

Upgrade to a fixed version: Apple iPadOS 15.7.4, 16.4; Apple Iphone Os 15.7.4, 16.4; Apple macOS 11.7.5, 12.6.4, 13.3; Apple watchOS 9.4. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT213670
• https://support.apple.com/en-us/HT213673
• https://support.apple.com/en-us/HT213675
• https://support.apple.com/en-us/HT213676
• https://support.apple.com/en-us/HT213677
• https://support.apple.com/en-us/HT213678
• https://support.apple.com/en-us/HT213670
• https://support.apple.com/en-us/HT213673
• https://support.apple.com/en-us/HT213675
• https://support.apple.com/en-us/HT213676
• https://support.apple.com/en-us/HT213677
• https://support.apple.com/en-us/HT213678

Get alerted when CVE-2023-27961 or the next vulnerability affects your stack