The set_version script as shipped with obs-service-set_version is a source validator for the Open Build Service (OBS). In versions prior to 0.5.3-1.1 this script did not properly sanitize the input provided by the user, allowing for code execution on the executing server.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.