CVE-2021-23253

2021-01-1115:43:01

Opera

www.cve.org

cve-2021-23253

url alignment vulnerability

address field display

AI Score

5.4

Confidence

High

EPSS

0.001

Percentile

35.9%

JSON

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.

CNA Affected

[
  {
    "product": "Opera Mini for Android",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Below 53.1"
      }
    ]
  }
]

References

security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/