CVE-2021-33595

F-Secure Safe browser for iOS vulnerable to Address Bar Spoofing

3.5 Low

A address bar spoofing vulnerability was discovered in Safe Browser for iOS. Showing the legitimate URL in the address bar while loading the content from other domain. This makes the user believe that the content is served by a legit domain. A remote attacker can leverage this to perform address bar spoofing attack.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

1.07%Unchanged since Aug 12, 2021

What each source reports

CVE List Score used 3.5

F-Secure Safe browser for iOS vulnerable to Address Bar Spoofing

Record: CVE-2021-33595
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

EUVDEUVD-2021-20279 3.5

Record: EUVD-2021-20279
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9crg-g7r6-784v No score

A address bar spoofing vulnerability was discovered in Safe Browser for iOS. Showing the...

Record: GHSA-9crg-g7r6-784v
Updated: 2026-11-02

NVD 3.5

Record: CVE-2021-33595
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CVSS 2.0: 3.5 LowAV:N/AC:M/Au:S/C:N/I:P/A:N
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-33595 is a low vulnerability (CVSS 3.5) in F-secure Safe, published August 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.07%, the 65th percentile. No source names a fixed version.