
CVE-2001-0898 – Opera 5.0/5.1 - Same Origin Policy Circumvention
https://notcve.org/view.php?id=CVE-2001-0898
15 Nov 2001 — Opera 6.0 and earlier allows remote attackers to access sensitive information such as cookies and links for other domains via Javascript that uses setTimeout to (1) access data after a new window to the domain has been opened or (2) access data via about:cache. • https://www.exploit-db.com/exploits/21156 •

CVE-2001-1245
https://notcve.org/view.php?id=CVE-2001-1245
09 Jul 2001 — Opera 5.0 for Linux does not properly handle malformed HTTP headers, which allows remote attackers to cause a denial of service, possibly with a header whose value is the same as a MIME header name. • http://online.securityfocus.com/archive/1/196980 •

CVE-1999-1283
https://notcve.org/view.php?id=CVE-1999-1283
14 Aug 1998 — Opera 3.2.1 allows remote attackers to cause a denial of service (application crash) via a URL that contains an extra / in the http:// tag. • http://www.securityfocus.com/archive/1/10320 •