A vulnerability was identified in O2OA up to 9.0.0. This impacts an unknown function of the file /xprogramcenter/jaxrs/mpweixin/check of the component HTTP POST Request Handler. The manipulation leads to xml external entity reference. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
O2OA 9.1.3 is vulnerable to Cross Site Scripting (XSS) in Meetings - Settings.
An arbitrary file upload vulnerability in O2OA v8.3.8 allows attackers to execute arbitrary code via uploading a crafted PDF file.