A vulnerability was found in TrueConf Server 4.3.7. It has been classified as problematic. Affected is an unknown function of the file /admin/group/list/. The manipulation of the argument checked_group_id leads to basic cross site scripting (Reflected). Using CWE to declare the problem leads to CWE-80. The weakness was published 01/29/2017 by LiquidWorm as EDB-ID 41184 as Exploit (Exploit-DB). The advisory is available at exploit-db.com. This vulnerability is traded as CVE-2017-20116. It is possible to launch the attack remotely. Technical details are available. Furthermore, there is an exploit available. The exploit has been disclosed to the public and may be used. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project. It is declared as proof-of-concept. The exploit is shared for download at exploit-db.com. As 0-day the estimated underground price was around $0-$5k. Upgrading to version 5.2.0 is able to address this issue. It is recommended to upgrade the affected component. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

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