Vulnerability · Published Jan 11, 2021 · Assigned by Opera
CVE-2021-23253
Medium 5.3
In plain English
A medium-severity security flaw in Opera Mini for Android. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities).
Official 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. www.safe.opera.com.attacker.com. With the URL being left-aligned, the user will only see the front part (e.g. www.safe.opera.com…) 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Opera Mini for Android | Below 53.1 |