CVE-2021-40835
mediumpriority · track · 17EPSS 0.007 · 54 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (8)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-40835cnnvd
- https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-famecnnvd
- https://www.f-secure.com/en/business/support-and-downloads/security-advisoriescnnvd
- https://www.withsecure.com/en/support/security-advisories/cve-2021-40835Patchcnnvd
- https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameenisa_euvd
- https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesenisa_euvd
- https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameVendor Advisorynvd
- https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisorynvd
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