cjbi wetech-cms TopicDao.java searchTopic sql injection

A vulnerability was found in cjbi wetech-cms 1.0/1.1/1.2. It has been classified as critical. Affected is the function searchTopic of the file wetech-cms-master\wetech-core\src\main\java\tech\wetech\cms\dao\TopicDao.java. The manipulation of the argument con leads to sql injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.