Cyber Resilience

CVE-2024-40857

Medium

Published: 17 September 2024

Published
17 September 2024
Modified
02 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0015 35.5th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-40857 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Apple Safari. Its CVSS base score is 6.1 (Medium).

Operationally, ranked at the 35.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

This issue was addressed through improved state management. This issue is fixed in Safari 18, iOS 18 and iPadOS 18, macOS Sequoia 15, tvOS 18, visionOS 2, watchOS 11. Processing maliciously crafted web content may lead to universal cross site…

more

scripting.

CWE(s)
CWE-79

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

apple
safari
≤ 18.0
apple
ipados
≤ 18.0
apple
iphone os
≤ 18.0
apple
macos
≤ 15.0
apple
tvos
≤ 18.0
apple
visionos
≤ 2.0
apple
watchos
≤ 11.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References