The remote host is affected by the vulnerability described in GLSA-201206-03 (Opera: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Opera. Please review       the CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to open a specially crafted web       page, possibly resulting in execution of arbitrary code with the       privileges of the process or a Denial of Service condition. A remote       attacker may be able to: trick users into downloading and executing       arbitrary files, bypass intended access restrictions, spoof trusted       content, spoof URLs, bypass the Same Origin Policy, obtain sensitive       information, force subscriptions to arbitrary feeds, bypass the popup       blocker, bypass CSS filtering, conduct cross-site scripting attacks, or       have other unknown impact.
    A local attacker could perform symlink attacks to overwrite arbitrary       files with the privileges of the user running the application or possibly       obtain sensitive information.
    A physically proximate attacker may be able to access an email account.
  Workaround :

    There is no known workaround at this time.

The version of Opera installed on the remote Windows host is prior to 11.51. It is, therefore, affected by multiple vulnerabilities :

  - An unspecified error can allow an insecure or malicious     site to cause the browser to display security     information belonging to another, secure site in the     address bar. This causes the insecure or malicious site     to appear to be part of, or secured by, a third-party     site. (CVE-2011-3388)

  - An information disclosure vulnerability, known as BEAST,     exists in the SSL 3.0 and TLS 1.0 protocols due to a     flaw in the way the initialization vector (IV) is     selected when operating in cipher-block chaining (CBC)     modes. A man-in-the-middle attacker can exploit this     to obtain plaintext HTTP header data, by using a     blockwise chosen-boundary attack (BCBA) on an HTTPS     session, in conjunction with JavaScript code that uses     the HTML5 WebSocket API, the Java URLConnection API,     or the Silverlight WebClient API. (CVE-2011-3389)

The Opera browser received a security and bugfix update to 11.51.

More information can be found here:
http://www.opera.com/docs/changelogs/unix/1151/

CVE-2011-3388 - incorrect security information display CVE-2011-3389 - unspecified 'low severity issue, as reported by Thai Duong and Juliano Rizzo.'

The remote host is running the Opera web browser. 

Versions of Opera earlier than 11.51 are potentially affected by multiple vulnerabilities : 

  - Unsecured web content could appear secure. (Issue 1000)

  - An unspecified issue.

ID	Name	Product	Family	Published	Updated	Severity
59631	GLSA-201206-03 : Opera: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	6/21/2012	1/6/2021	critical
56042	Opera < 11.51 Multiple Vulnerabilities (BEAST)	Nessus	Windows	9/1/2011	12/5/2022	medium
75697	openSUSE Security Update : opera (openSUSE-SU-2011:1025-1) (BEAST)	Nessus	SuSE Local Security Checks	6/13/2014	12/5/2022	medium
75984	openSUSE Security Update : opera (openSUSE-SU-2011:1025-1) (BEAST)	Nessus	SuSE Local Security Checks	6/13/2014	12/5/2022	medium
6019	Opera < 11.51 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	8/31/2011	3/6/2019	high
800858	Opera < 11.51 Multiple Vulnerabilities	Log Correlation Engine	Web Clients	8/31/2011		high

Detections

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critical

medium

medium

medium

high

high