Address bar spoofing in Opera Mini – Opera Security Advisories

CVE ID: CVE-2021-23253
PRODUCT: Opera Mini for Android
VERSION: Below 53.1
PROBLEM TYPE: Address bar spoofing
DESCRIPTION: Opera Mini for Android below 53.1 displays URL left-aligned in the address field. This allows a malicious attacker to craft a URL with a long domain name, e.g. With the URL being left-aligned, the user will only see the front part (e.g.…) The exact amount depends on the phone screen size but the attacker can craft a number of different domains and target different phones. Starting with version 53.1 Opera Mini displays long URLs with the top-level domain label aligned to the right of the address field which mitigates the issue.