CMS results on flavor spectroscopy

\[ The CMS experiment at the LHC has reported new discoveries in flavor spectroscopy. In this talk, the observation of Ξ_b(6100)^- baryon, the decay Λ_0^b → J/ψ Ξ^- K^+, the first observation of η → μ^+ μ^- μ^+ μ^- decay, and exotic resonances near the J/ψ J/ψ threshold are presented. All these results use the CMS data collected in proton-proton collisions at 13 TeV. \]