{"id":23339,"date":"2026-09-16T04:31:26","date_gmt":"2026-09-15T20:31:26","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18421"},"modified":"2026-09-16T04:31:26","modified_gmt":"2026-09-15T20:31:26","slug":"cve-2026-18421","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18421","title":{"rendered":"CVE-2026-18421 &#8211; Concrete CMS 9 through 9.5.2 does not perform an authorization check in three actions of t"},"content":{"rendered":"<p>Concrete CMS 9 through 9.5.2 does not perform an authorization check in three actions of the Boards data source dashboard controller (update, update_data_source, and delete_data_source), which resolve a ConfiguredDataSource directly from an attacker-supplied identifier without confirming the requester&#8217;s edit permission on the owning board. A user granted edit_board_settings on a single board was therefore able to modify or permanently delete the configured data sources of any other board on the site, halting the affected board&#8217;s content feed and resetting its custom weighting. The CSRF token that guards these actions was validated but bound to the action name rather than to the target object, so a token legitimately obtained for one board could be replayed against another board&#8217;s ConfiguredDataSource identifier and did not constrain access.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.1 with vector CVSS:4.0\/AV:N\/AC:L\/AT:P\/PR:H\/UI:N\/VC:N\/VI:L\/VA:L\/SC:N\/SI:N\/SA:N. Thanks Winston Crooker for reporting.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Concrete CMS 9 through 9.5.2 does not perform an authorization check in three actions of the Boards data source dashboard controller (update, update_data_source, and delete_data_source), which resolve<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-23339","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/23339","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=23339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}