CVE-2025-24143Network attack vector

User fingerprinting via insufficient file-system restrictions

Published Jan 27, 2025 · Updated Apr 2, 2026

File-system access control weakness in Apple WebKit before Safari 18.3 allows remote attackers to fingerprint users via a crafted webpage. WebKit permits webpage content to derive identifying file-system signals without sufficient access restrictions; Apple has not disclosed the specific API or path. Exploitation requires loading attacker-controlled web content, and the reported consequence is user tracking without data modification or service interruption.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File-system access control weakness in Apple WebKit before Safari 18.3 allows remote attackers to fingerprint users via a crafted webpage. WebKit permits webpage content to derive identifying file-system signals without sufficient access restrictions; Apple has not disclosed the specific API or path. Exploitation requires loading attacker-controlled web content, and the reported consequence is user tracking without data modification or service interruption.

The record

CVE
CVE-2025-24143
Published
Jan 27, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-862, T1592.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <18.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.3
Apple · visionOSversion=0 <2.3
Apple · Safariversion=0 <18.3
Apple · macOSversion=0 <15.3

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1592.004Gather Victim Host Information: Client Configurations

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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