"In 2013, the International Court of Justice (ICJ) reaffirmed its 1962 ruling that the Preah Vihear Temple, located on the Cambodian-Thai border, belonged to Cambodia, following a request from Cambodia for clarification on the ruling. The 2013 ruling also addressed the extent of the temple's vicinity, stating it included the cliff on which the temple stood but not the surrounding area. This reaffirmation did not resolve the underlying border dispute, and tensions continued to simmer, leading to further clashes and requests for clarification from the ICJ"
That seems absolutely crystal clear to me. The rights to the surrounding land has not been resolved.