CVE-2021-33593Network attack vector

Address-bar spoofing via inconsistent location display

Published Nov 2, 2021 · Updated Aug 3, 2024

Address-bar spoofing in NAVER Whale Browser for iOS before 1.14.0 allows remote attackers to disguise a page's true address. The browser's address-bar interface inconsistently represents a page's location, allowing attacker-controlled content to obscure the actual address. A victim must view attacker-controlled content in the affected mobile browser; the spoofed security indicator can support phishing, but no code execution or data access is reported.

CVSS severity5.3
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Address-bar spoofing in NAVER Whale Browser for iOS before 1.14.0 allows remote attackers to disguise a page's true address. The browser's address-bar interface inconsistently represents a page's location, allowing attacker-controlled content to obscure the actual address. A victim must view attacker-controlled content in the affected mobile browser; the spoofed security indicator can support phishing, but no code execution or data access is reported.

The record

CVE
CVE-2021-33593
Published
Nov 2, 2021
Updated
Aug 3, 2024
Vendor
NAVER Corporation
Product
NAVER Whale Browser
Classifications
CWE-451, CAPEC-154, T1598.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <1.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NAVER Corporation · NAVER Whale Browserversion=unspecified <1.14.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/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 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

CWE-451User Interface (UI) Misrepresentation of Critical Information
CAPEC-154Resource Location Spoofing
T1598.003Phishing for Information: Spearphishing Link

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo