CVE-2021-44683Public exploitNetwork attack vector

Credential theft via spoofed secondary-window address bar

Published Mar 25, 2022 · Updated Aug 4, 2024

Address-bar spoofing in DuckDuckGo Browser 7.64.4 on iOS allows remote attackers to solicit credentials through malicious pages. A window.open call creates a secondary window whose address bar retains a legitimate URL while rendering content hosted on an attacker-controlled site. Exploitation requires user interaction with the crafted page and disclosure occurs only if the user submits sensitive information.

CVSS severity8.2
High
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Address-bar spoofing in DuckDuckGo Browser 7.64.4 on iOS allows remote attackers to solicit credentials through malicious pages. A window.open call creates a secondary window whose address bar retains a legitimate URL while rendering content hosted on an attacker-controlled site. Exploitation requires user interaction with the crafted page and disclosure occurs only if the user submits sensitive information.

The record

CVE
CVE-2021-44683
Published
Mar 25, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1021, T1056.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/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 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 exploitPublished

Weakness, pattern, technique

CWE-1021Improper Restriction of Rendered UI Layers or Frames
T1056.003Input Capture: Web Portal Capture

Public exploit references

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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