oauth/oauth2/v1/saml/ in Abacus OAuth Login 2019_01_r4_20191021_0000 before prior to R4 (20.11.2019 Hotfix) allows Reflected Cross Site Scripting (XSS) via an error message.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 55.3%