Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not validate m_Channels value coming from a map file, leading to a buffer overflow. A malicious server may offer a specially crafted map that will overwrite client's stack causing denial of service or code execution.
In Teeworlds 0.7.2, there is an integer overflow in CMap::Load() in engine/shared/map.cpp that can lead to a buffer overflow, because multiplication of width and height is mishandled.
In Teeworlds 0.7.2, there is a failed bounds check in CDataFileReader::GetData() and CDataFileReader::ReplaceData() and related functions in engine/shared/datafile.cpp that can lead to an arbitrary free and out-of-bounds pointer write, possibly resulting in remote code execution.
In Teeworlds 0.7.2, there is an integer overflow in CDataFileReader::Open() in engine/shared/datafile.cpp that can lead to a buffer overflow and possibly remote code execution, because size-related multiplications are mishandled.