CVE-2023-39233Network attack vector

Sensitive information disclosure via crafted web content

Published Sep 26, 2023 · Updated Nov 4, 2025

Information disclosure in Safari on Apple macOS before 14 allows remote attackers to read sensitive information via web content. Apple has not published the flawed Safari check or the specific web-content operation that exposes the data. Exploitation requires a user to process attacker-controlled web content, and the reported consequence is limited to confidentiality.

CVSS severity6.5
Medium
EPSS probability0.72%
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 Safari on Apple macOS before 14 allows remote attackers to read sensitive information via web content. Apple has not published the flawed Safari check or the specific web-content operation that exposes the data. Exploitation requires a user to process attacker-controlled web content, and the reported consequence is limited to confidentiality.

The record

CVE
CVE-2023-39233
Published
Sep 26, 2023
Updated
Nov 4, 2025
Vendor
Apple
Product
macOS
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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 <14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=unspecified <14

Published CVSS scores

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

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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