{"api_version":"1","generated_at":"2026-04-23T01:19:06+00:00","cve":"CVE-2021-23253","urls":{"html":"https://cve.report/CVE-2021-23253","api":"https://cve.report/api/cve/CVE-2021-23253.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-23253","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23253"},"summary":{"title":"CVE-2021-23253","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.","state":"PUBLIC","assigner":"security@opera.com","published_at":"2021-01-11 16:15:00","updated_at":"2021-01-20 02:42:00"},"problem_types":["NVD-CWE-Other"],"metrics":[],"references":[{"url":"https://security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/","name":"https://security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"Address bar spoofing in Opera Mini – Opera Security Advisories - Opera Security Corner","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23253","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23253","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"23253","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opera","cpe5":"opera_mini","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"android","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"23253","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opera","cpe5":"opera_mini","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"android","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2021-23253","ASSIGNER":"security@opera.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Opera Mini for Android","version":{"version_data":[{"version_value":"Below 53.1"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Address bar spoofing"}]}]},"references":{"reference_data":[{"refsource":"CONFIRM","name":"https://security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/","url":"https://security.opera.com/address-bar-spoofing-in-opera-mini-opera-security-advisories/"}]},"description":{"description_data":[{"lang":"eng","value":"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."}]}},"nvd":{"publishedDate":"2021-01-11 16:15:00","lastModifiedDate":"2021-01-20 02:42:00","problem_types":["NVD-CWE-Other"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"},"exploitabilityScore":3.9,"impactScore":1.4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opera:opera_mini:*:*:*:*:*:android:*:*","versionEndExcluding":"53.1","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"23253","Ordinal":"197979","Title":"CVE-2021-23253","CVE":"CVE-2021-23253","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"23253","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"23253","Ordinal":"2","NoteData":"2021-01-11","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"23253","Ordinal":"3","NoteData":"2021-01-11","Type":"Other","Title":"Modified"}]}}}