The PlonePAS product 3.x before 3.9 and 3.2.x before 3.2.2, a product for Plone, does not properly handle the login form, which allows remote authenticated users to acquire the identity of an arbitrary user via unspecified vectors.
"https://github.com/pypa/advisory-database/blob/main/vulns/plone/PYSEC-2009-17.yaml"