{"id":27273,"date":"2026-09-22T04:30:49","date_gmt":"2026-09-21T20:30:49","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-58271"},"modified":"2026-09-22T04:30:49","modified_gmt":"2026-09-21T20:30:49","slug":"cve-2026-58271","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-58271","title":{"rendered":"CVE-2026-58271 [MEDIUM] &#8211; Sync-in Server is an open-source platform for file storage, sharing, collaboration, and sy"},"content":{"rendered":"<p>Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST \/api\/app\/sync\/register` accepts credentials and a TOTP code to register a desktop sync client. On a failed TOTP, `SyncClientsManager.register()` calls `updateAccesses(user, ip, false)`, which hits a freeze branch that writes `passwordAttempts` back unchanged. The counter never reaches `USER_MAX_PASSWORD_ATTEMPTS` (10) and the lockout gate never fires. A successful guess returns a `{clientId, clientToken}` pair. The token can be exchanged via `POST \/api\/app\/sync\/auth\/cookie` for a full JWT. While the code is valid, the attacker can also call `POST \/api\/auth\/2fa\/disable` to permanently remove MFA. Version 2.4.0 patches the issue.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST \/api\/app\/sync\/register` accepts credentials and a TOTP code to register a<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-27273","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/27273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}