Cross-origin data exfiltration in WebKit
CVE-2025-43480 is a WebKit cross-origin data exposure vulnerability in which a malicious website may exfiltrate data across origins. The issue was addressed by Apple and downstream WebKit consumers with improved checks. The provided context shows the flaw affected Safari and multiple Apple platforms, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, and also affected WebKitGTK and WPE WebKit before 2.46.0. The available information does not identify the exact vulnerable function or code path, only that insufficient checks in WebKit allowed cross-origin data access contrary to browser origin-isolation expectations.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Web content processing issue leading to unexpected process crash.
A cross-origin data exfiltration vulnerability in web content processing affecting macOS Sonoma and macOS Sequoia.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.