{"id":79259,"date":"2026-06-03T23:46:21","date_gmt":"2026-06-03T20:16:21","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-43924-fossbilling-has-an-open-redirect-via-administrator-configured-redirect-targets\/"},"modified":"2026-06-03T23:46:21","modified_gmt":"2026-06-03T20:16:21","slug":"cve-2026-43924-fossbilling-has-an-open-redirect-via-administrator-configured-redirect-targets","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-43924-fossbilling-has-an-open-redirect-via-administrator-configured-redirect-targets\/","title":{"rendered":"CVE-2026-43924 &#8211; FOSSBilling has an open redirect via administrator-configured redirect targets"},"content":{"rendered":"<p>CVE ID :CVE-2026-43924<\/p>\n<p>  Published : June 3, 2026, 8:16 p.m. | 16\u00a0minutes ago<\/p>\n<p>  Description :FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, the Redirect module does not validate the URL scheme of administrator-configured destination URLs before storing or issuing redirects. This allows arbitrary external URLs to be configured as redirect targets, creating an open redirect vulnerability exploitable for phishing attacks. Users following a legitimate FOSSBilling URL can be silently redirected to an attacker-controlled external site. The redirect is issued as a 301 (Moved Permanently) response, which browsers cache persistently, amplifying the impact. Exploitation requires administrator privileges to create or modify redirect entries, limiting practical attack scenarios to multi-admin environments or compromised admin accounts. Version 0.8.0 fixes the issue. Some workarounds are available. Restrict admin access to the Redirect module to trusted administrators only and\/or audit existing redirect entries in the database (the `extension_meta` table with `extension = &#8216;mod_redirect&#8217;`) for any unexpected or external target URLs.<\/p>\n<p>  Severity: 4.8 | MEDIUM<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-43924 Published : June 3, 2026, 8:16 p.m. | 16\u00a0minutes ago Description :FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, the Redirect module does not validate the URL scheme of administrator-configured destination URLs before storing or issuing redirects. This allows arbitrary external URLs to be configured as &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-79259","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=79259"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79259\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=79259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=79259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=79259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}