{"id":16012,"date":"2026-09-04T19:04:39","date_gmt":"2026-09-04T11:04:39","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-52778"},"modified":"2026-09-04T19:04:39","modified_gmt":"2026-09-04T11:04:39","slug":"cve-2026-52778","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-52778","title":{"rendered":"CVE-2026-52778 [CRITICAL] &#8211; YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulne"},"content":{"rendered":"<p>YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulnerability exists in the Bazar form field calculator (CalcField.php) of YesWiki. The application attempts to sanitize user-defined mathematical formulas using a complex recursive regular expression before passing them to the PHP eval() function. This implementation is inherently flawed: it is vulnerable to Regular Expression Denial of Service (ReDoS \/ Stack Overflow) which can crash the server, and it creates a high-risk architecture where any logic bypass directly results in arbitrary PHP code execution. Version 4.6.6 patches the issue.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulnerability exists in the Bazar form field calculator (CalcField.php) of YesWiki. The application attempts to san<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-16012","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/16012","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=16012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}