CVE-2021-40835

URL Address Bar Spoofing in F-Secure SAFE Browser for iOS

MEDIUM
4.3
CVSS Score
Published: December 16, 2021 at 10:58 AM UTC
Updated: June 17, 2026 at 04:07 AM UTC
2 products affected across 1 vendorSafeSecure Safe

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 18.3
Affected range stops below 18.3, so it looks safe — our inference, not a vendor statement
18.3 ≤ v < 18.518.3
Affected range stops below 18.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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