Jenkins Pipeline: Input Step Plugin 451.vf1a_a_4f405289 and earlier does not restrict or sanitize the optionally specified ID of the input step, which is used for the URLs that process user interactions for the given input step (proceed or abort) and is not correctly encoded, allowing attackers able to configure Pipelines to have Jenkins build URLs from input step IDs that would bypass the CSRF protection of any target URL in Jenkins when the ‘input’ step is interacted with. Pipeline: Input Step Plugin 456.vd8a_957db_5b_e9 limits the characters that can be used for the ID of input steps in Pipelines to alphanumeric characters and URL-safe punctuation. Pipelines with input steps having IDs with prohibited characters will fail with an error.
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