Submitty through 20.04.01 has an open redirect via authentication/login?old= during an invalid login attempt.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

• Submitty <= 20.04.01 - Open Redirect http/cves/2020/CVE-2020-13121.yaml

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.