Medium severity · published Jan 11, 2021
CVE-2021-23253
Opera Mini for Android below 53.1 displays URL left-aligned in the address field
5.3
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OM
Opera Mini · Opera
before 53.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-23253
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-23253
Vendor Advisory
https://security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/
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