The version of Opera installed on the remote host is prior to 12.00.
It is, therefore, affected by multiple vulnerabilities :

  - An error exists that can allow the address bar to     display incorrect locations due to certain combinations     of navigation, reloads and redirects, which can aid in     phishing attacks. (1018)

  - An error in JSON handling can allow cross-site     scripting attacks. (1019)

  - An error exists related to handling double-click     actions and new windows that can be used in cross-site     scripting attacks. (1020)

  - An error exists in the handling of window focus that     can allow keystrokes to be associated with non-visible     windows. (1021)

  - An error in the handling of page loading can allow a     malicious page to prevent the loading while showing an     incorrect URL in the address bar. (1022)

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.

ID	Name	Product	Family	Published	Updated	Severity
59555	Opera < 12 Multiple Vulnerabilities	Nessus	Windows	6/18/2012	11/15/2018	high
59631	GLSA-201206-03 : Opera: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	6/21/2012	1/6/2021	critical

Detections

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high

critical