{"id":39994,"date":"2026-10-16T04:34:21","date_gmt":"2026-10-15T20:34:21","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-55875"},"modified":"2026-10-16T04:34:21","modified_gmt":"2026-10-15T20:34:21","slug":"cve-2026-55875","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-55875","title":{"rendered":"CVE-2026-55875 [MEDIUM] &#8211; Helium is a free online student planner for classes, homework, grades, and notes. Prior to"},"content":{"rendered":"<p>Helium is a free online student planner for classes, homework, grades, and notes. Prior to 2.2.60, any authenticated user can submit an arbitrary URL to POST \/feed\/externalcalendars\/, where helium\/feed\/services\/icalexternalcalendarservice.py uses validate_url to check only URL syntax before passing the value to urllib.request.urlopen, and fetch_ical_conditional periodically refetches the stored URL. The server can therefore issue requests to attacker-selected external or internal hosts, while distinct responses, including an uncaught http.client.RemoteDisconnected condition for non-HTTP services, reveal internal host and port reachability. The supported impact is forced outbound requests and internal service reconnaissance; the advisory does not demonstrate secret retrieval because the relevant ECS credentials path is task-specific and unpredictable. This issue is fixed in version 2.2.60.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Helium is a free online student planner for classes, homework, grades, and notes. Prior to 2.2.60, any authenticated user can submit an arbitrary URL to POST \/feed\/externalcalendars\/, where helium\/fee<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-39994","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/39994","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=39994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}