The version of Opera installed on the remote host is earlier than 10.51.  Such versions are potentially affected by multiple issues :

  - Large values in the HTTP Content-Length header can be     used to execute arbitrary code. (948)

  - XSLT can be used to retrieve random contents of     unrelated documents. (949)

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 host is earlier than 10.51.  Such versions are potentially affected by multiple vulnerabilities : 

  - Large values in the HTTP Content-Length header can be used to execute arbitrary code. (948)

  - XSLT can be used to retrieve random contents of unrelated documents. (949)

ID	Name	Product	Family	Published	Updated	Severity
45121	Opera < 10.51 Multiple Vulnerabilities	Nessus	Windows	3/22/2010	11/15/2018	high
59631	GLSA-201206-03 : Opera: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	6/21/2012	1/6/2021	critical
5484	Opera < 10.51 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	3/22/2010	3/6/2019	medium
800851	Opera < 10.51 Multiple Vulnerabilities	Log Correlation Engine	Web Clients	3/22/2010		high

Detections

Analytics

Plugins Search

high

critical

medium

high