In OWASP AntiSamy before 1.5.5, by submitting a specially crafted input (a tag that supports style with active content), you could bypass the library protections and supply executable code. The impact is XSS.
Exploitability
AV:NAC:LPR:NUI:RScope
S:CImpact
C:LI:LA:N6.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N