Opera reports :

Certain constructs are not escaped correctly by Opera's History Search results. These can be used to inject scripts into the page, which can then be used to look through the user's browsing history, including the contents of the pages they have visited. These may contain sensitive information.

If a link that uses a JavaScript URL triggers Opera's Fast Forward feature, when the user activates Fast Forward, the script should run on the current page. When a page is held in a frame, the script is incorrectly executed on the outermost page, not the page where the URL was located. This can be used to execute scripts in the context of an unrelated frame, which allows cross-site scripting.

When Opera is previewing a news feed, some scripts are not correctly blocked. These scripts are able to subscribe the user to any feed URL that the attacker chooses, and can also view the contents of any feeds that the user is subscribed to. These may contain sensitive information.

The version of Opera installed on the remote host is earlier than 9.61 and thus reportedly affected by several issues :

  - It may be possible to reveal a user's browsing history     by exploiting certain constructs in Opera's History     Search results (903).
  - Opera's Fast Forward feature is affected by a cross-site     scripting vulnerability (904). 

  - While previewing certain news feeds, it may be possible     for certain scripts to subscribe an user to arbitrary     feeds, and also view contents of user subscribed feeds     (905).

The remote host is affected by the vulnerability described in GLSA-200811-01 (Opera: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Opera:
    Opera does not restrict the ability of a framed web page to change     the address associated with a different frame (CVE-2008-4195).
    Chris Weber (Casaba Security) discovered a Cross-site scripting     vulnerability (CVE-2008-4196).
    Michael A. Puls II discovered     that Opera can produce argument strings that contain uninitialized     memory, when processing custom shortcut and menu commands     (CVE-2008-4197).
    Lars Kleinschmidt discovered that Opera, when     rendering an HTTP page that has loaded an HTTPS page into a frame,     displays a padlock icon and offers a security information dialog     reporting a secure connection (CVE-2008-4198).
    Opera does not     prevent use of links from web pages to feed source files on the local     disk (CVE-2008-4199).
    Opera does not ensure that the address     field of a news feed represents the feed's actual URL     (CVE-2008-4200).
    Opera does not check the CRL override upon     encountering a certificate that lacks a CRL (CVE-2008-4292).
    Chris (Matasano Security) reported that Opera may crash if it is     redirected by a malicious page to a specially crafted address     (CVE-2008-4694).
    Nate McFeters reported that Opera runs Java     applets in the context of the local machine, if that applet has been     cached and a page can predict the cache path for that applet and load     it from the cache (CVE-2008-4695).
    Roberto Suggi Liverani     (Security-Assessment.com) reported that Opera's History Search results     does not escape certain constructs correctly, allowing for the     injection of scripts into the page (CVE-2008-4696).
    David     Bloom reported that Opera's Fast Forward feature incorrectly executes     scripts from a page held in a frame in the outermost page instead of     the page the JavaScript URL was located (CVE-2008-4697).
    David     Bloom reported that Opera does not block some scripts when previewing a     news feed (CVE-2008-4698).
    Opera does not correctly sanitize     content when certain parameters are passed to Opera's History Search,     allowing scripts to be injected into the History Search results page     (CVE-2008-4794).
    Opera's links panel incorrectly causes     scripts from a page held in a frame to be executed in the outermost     page instead of the page where the URL was located     (CVE-2008-4795).
  Impact :

    These vulnerabilities allow remote attackers to execute arbitrary code,     to run scripts injected into Opera's History Search with elevated     privileges, to inject arbitrary web script or HTML into web pages, to     manipulate the address bar, to change Opera's preferences, to determine     the validity of local filenames, to read cache files, browsing history,     and subscribed feeds or to conduct other attacks.
  Workaround :

    There is no known workaround at this time.

The version of Opera installed on the remote host is earlier than 9.61 and is reportedly affected by several issues : 

  - It may be possible to reveal a user's browsing history by exploiting certain constructs in Opera's History Search results (903).
  - Opera's Fast Forward feature is affected by a cross-site scripting vulnerability (904). 
  - While previewing certain news feeds, it may be possible for certain scripts to subscribe a user to arbitrary feeds, and also view contents of user subscribed feeds (905). 

ID	名稱	產品	系列	已發布	已更新	嚴重性
34508	FreeBSD : opera -- multiple vulnerabilities (f5c4d7f7-9f4b-11dd-bab1-001999392805)	Nessus	FreeBSD Local Security Checks	2008/10/29	2021/1/6	medium
34459	Opera < 9.61 Multiple Vulnerabilities	Nessus	Windows	2008/10/21	2018/11/15	medium
34689	GLSA-200811-01 : Opera: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2008/11/4	2021/1/6	critical
4715	Opera < 9.61 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	2008/10/21	2019/3/6	medium

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medium