Vulnerability in F-Secure Mobile Security

CVE-2021-40835

An URL Address bar spoofing vulnerability was discovered in Safe Browser for iOS. When user clicks on a specially crafted a malicious URL, if user does not carefully pay attention to url, user may be tricked to think content may be coming from a valid domain, while it comes from another. This is performed by using a very long username part of the url so that user cannot see the domain name. A remote attacker can leverage this to perform url address bar spoofing attack. The fix is, browser no longer shows the user name part in address bar.

EPSS: 0.007 (51.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

References

Frequently asked questions

What is CVE-2021-40835?
CVE-2021-40835 is a medium-severity vulnerability in F-Secure Mobile Security. CVSS score: 4.6/10. Published 2021-12-16.
How severe is CVE-2021-40835?
Medium severity. CVSS v3 base score is 4.6 out of 10.