What is CVE-2021-44683?

CVE-2021-44683 is a high-severity vulnerability in Duckduckgo, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 8.2/10. Published 2022-03-25.

How severe is CVE-2021-44683?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Duckduckgo

CVE-2021-44683

The DuckDuckGo browser 7.64.4 on iOS allows Address Bar Spoofing due to mishandling of the JavaScript window.open function (used to open a secondary browser window). This could be exploited by tricking users into supplying sensitive information such as credentials, because the address bar would display a legitimate URL, but content would be hosted on the attacker's web site.

Published 2022-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Duckduckgo

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

www.cybercitadel.com/remote-address-bar-spoofing-and-html-injection-disclosures/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44683?: CVE-2021-44683 is a high-severity vulnerability in Duckduckgo, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 8.2/10. Published 2022-03-25.
How severe is CVE-2021-44683?: High severity. CVSS v3 base score is 8.2 out of 10.