Craft is a content management system (CMS). Craft CMS 5 allows reuse of TOTP tokens multiple times within the validity period. An attacker is able to re-submit a valid TOTP token to establish an authenticated session. This requires that the attacker has knowledge of the victim's credentials. This has been patched in Craft 5.2.3.
https://github.com/craftcms/cms/security/advisories/GHSA-wmx7-pw49-88jx
https://github.com/craftcms/cms/releases/tag/5.2.3
https://github.com/craftcms/cms/commit/7c790fa5ad5a8cb8016cb6793ec3554c4c079e38