Jenkins 2.550 and earlier, LTS 2.541.1 and earlier accepts Run Parameter values that refer to builds the user submitting the build does not have access to, allowing attackers with Item/Build and Item/Configure permission to obtain information about the existence of jobs, the existence of builds, and if a specified build exists, its display name.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "2.541.2"
},
{
"introduced": "0"
},
{
"fixed": "2.551"
}
]
}