In Shuup, versions 1.6.0 through 2.10.8 are vulnerable to reflected Cross-Site Scripting (XSS) that allows execution of arbitrary javascript code on a victim browser. This vulnerability exists due to the error page contents not escaped.
"https://github.com/pypa/advisory-database/blob/main/vulns/shuup/PYSEC-2021-350.yaml"