Privilege Escalation via Incorrect Permissions in TrueConf Server Linux

An attacker who gains the ability to execute arbitrary code on a system with TrueConf Server (Linux) versions from 4.7.2 up to, but not including, 5.5.6 installed, running as the user trueconf (by exploiting some other vulnerability), can elevate their privileges to root.

TrueConf Server Remote Unauthorized Function Enables Arbitrary Script Execution via Port 4307

A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could execute an arbitrary script by calling an undocumented function.

Remote Code Execution via Script Upload in TrueConf Server

A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.

TrueConf Server cross-site request forgery

A vulnerability classified as problematic was found in TrueConf Server 4.3.7. This vulnerability affects unknown code of the file /admin/service/stop/. The manipulation leads to cross-site request forgery. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

A Stored Cross-Site Scripting (XSS) vulnerability exists in the Meeting location field of the Create/Edit Conference functionality in TrueConf Server v5.5.2.10813. The injected payload is stored via the meeting_room parameter and executed when users visit the Conference Info page, allowing attackers to achieve full Account Takeover (ATO). This issue is caused by improper sanitization of user-supplied input in the meeting_room field.

A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal user to inject malicious spreadsheet formulas into exported chat logs via crafted Display Name.

An HTML Injection vulnerability in TrueConf server 5.5.2.10813 in the conference description field allows an attacker to inject arbitrary HTML in the Create/Edit conference functionality. The payload will be triggered when the victim opens the Conference Info page ([conference url]/info).