{"id":75752,"date":"2026-01-08T04:38:01","date_gmt":"2026-01-08T01:08:01","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-21881-kanboard-is-vulnerable-to-reverse-proxy-authentication-bypass\/"},"modified":"2026-01-08T04:38:01","modified_gmt":"2026-01-08T01:08:01","slug":"cve-2026-21881-kanboard-is-vulnerable-to-reverse-proxy-authentication-bypass","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-21881-kanboard-is-vulnerable-to-reverse-proxy-authentication-bypass\/","title":{"rendered":"CVE-2026-21881 &#8211; Kanboard is Vulnerable to Reverse Proxy Authentication Bypass"},"content":{"rendered":"<p>CVE ID : CVE-2026-21881<\/p>\n<p>Published :  Jan. 8, 2026, 1:08 a.m. | 1\u00a0hour, 20\u00a0minutes ago<\/p>\n<p>Description : Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below is vulnerable to a critical authentication bypass when REVERSE_PROXY_AUTH is enabled. The application blindly trusts HTTP headers for user authentication without verifying the request originated from a trusted reverse proxy. An attacker can impersonate any user, including administrators, by simply sending a spoofed HTTP header. This issue is fixed in version 1.2.49.<\/p>\n<p>Severity: 0.0 | NA<\/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-2026-21881 Published : Jan. 8, 2026, 1:08 a.m. | 1\u00a0hour, 20\u00a0minutes ago Description : Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below is vulnerable to a critical authentication bypass when REVERSE_PROXY_AUTH is enabled. The application blindly trusts HTTP headers for user authentication without verifying the request originated &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-75752","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75752","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=75752"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75752\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=75752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=75752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=75752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}