CVE-2025-31266Network attack vector

Domain spoofing via incorrect pop-up title truncation

Published Nov 21, 2025 · Updated Nov 21, 2025

UI spoofing in Safari before 18.5 and macOS before 15.5 allows remote attackers to misrepresent a pop-up window's domain name. Safari truncates a fully qualified domain name incorrectly when rendering the pop-up title, allowing attacker-controlled text to obscure or imitate the displayed origin. A user must visit an attacker-controlled website and rely on the title; Apple reports deceptive origin display only, not data access or code execution.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI spoofing in Safari before 18.5 and macOS before 15.5 allows remote attackers to misrepresent a pop-up window's domain name. Safari truncates a fully qualified domain name incorrectly when rendering the pop-up title, allowing attacker-controlled text to obscure or imitate the displayed origin. A user must visit an attacker-controlled website and rely on the title; Apple reports deceptive origin display only, not data access or code execution.

The record

CVE
CVE-2025-31266
Published
Nov 21, 2025
Updated
Nov 21, 2025
Vendor
Apple
Product
Safari
Classifications
CWE-451, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 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 <18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · Safariversion=unspecified <18.5
Apple · macOSversion=unspecified <15.5

Published CVSS scores

4.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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-451User Interface (UI) Misrepresentation of Critical Information
T1036Masquerading

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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