CVE-2023-27954Network attack vector

Sensitive information tracking via exposed origin data

Published May 8, 2023 · Updated Jan 29, 2025

Information disclosure in WebKit in affected Apple operating systems and Safari allows remote attackers to track sensitive user information. WebKit exposes origin information to website content, enabling it to act as a cross-site tracking signal; Apple has not disclosed the exact interface or data flow. Exploitation requires a user to load attacker-controlled web content, and the documented consequence is tracking rather than direct data reading or modification.

CVSS severity6.5
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in WebKit in affected Apple operating systems and Safari allows remote attackers to track sensitive user information. WebKit exposes origin information to website content, enabling it to act as a cross-site tracking signal; Apple has not disclosed the exact interface or data flow. Exploitation requires a user to load attacker-controlled web content, and the documented consequence is tracking rather than direct data reading or modification.

The record

CVE
CVE-2023-27954
Published
May 8, 2023
Updated
Jan 29, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-863
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2025Record 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=unspecified <15.7
  2. Affected versionversion=unspecified <16.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.7; version=unspecified <16.4
Apple · Safariversion=unspecified <16.4
Apple · tvOSversion=unspecified <16.4
Apple · macOSversion=unspecified <13.3
Apple · watchOSversion=unspecified <9.4

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.5CISA-ADPCVSS: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-863Incorrect Authorization

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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