{"id":40372,"date":"2026-10-16T16:33:10","date_gmt":"2026-10-16T08:33:10","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18551"},"modified":"2026-10-16T16:33:10","modified_gmt":"2026-10-16T08:33:10","slug":"cve-2026-18551","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-18551","title":{"rendered":"CVE-2026-18551 [MEDIUM] &#8211; Mattermost versions 11.10.x"},"content":{"rendered":"<p>Mattermost versions 11.10.x &lt;= 11.10.0, 11.7.x &lt;= 11.7.9, 11.9.x &lt;= 11.9.1, 11.8.x &lt;= 11.8.5 fail to validate the combination of guest and admin scheme roles which allows an authenticated attacker to escalate a guest account to team or channel admin via a crafted PUT request to the member roles API endpoint.. Mattermost Advisory ID: MMSA-2026-00752<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mattermost versions 11.10.x<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-40372","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/40372","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=40372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}