A vulnerability has been identified in Mendix Applications using Mendix 7 (All versions < V7.23.34), Mendix Applications using Mendix 8 (All versions < V8.18.23), Mendix Applications using Mendix 9 (All versions < V9.22.0), Mendix Applications using Mendix 9 (V9.12) (All versions < V9.12.10), Mendix Applications using Mendix 9 (V9.18) (All versions < V9.18.4), Mendix Applications using Mendix 9 (V9.6) (All versions < V9.6.15). Some of the Mendix runtime API’s allow attackers to bypass XPath constraints and retrieve information using XPath queries that trigger errors.
https://cert-portal.siemens.com/productcert/pdf/ssa-252808.pdf