{"id":"CVE-2026-109219","kind":"vulnerability","aliases":["CVE-2026-109219"],"related":[],"title":"The Mang Board plugin for WordPress is vulnerable to Arbitrary File Upload in version 2.4.4 via the mbw_file_upload…","description":"The Mang Board plugin for WordPress is vulnerable to Arbitrary File Upload in version 2.4.4 via the mbw_file_upload function. This is due to missing file extension validation on the attacker-supplied image_path parameter, whose basename-derived file name bypasses the extension allowlist applied only to the separate file_name parameter. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. Exploitation requires the board to be configured to allow guest posts, which is the plugin's default mode; the required nonce is printed on every public board page, making it readable by any unauthenticated visitor without a WordPress login.","summary":"Mang Board <= 2.4.4 (WordPress plugin, slug mangboard) lets unauthenticated visitors upload arbitrary files, including PHP, via mbw_file_upload. The image_path parameter bypasses the extension allowlist that only covers file_name. Exploitation needs guest posts enabled, which is the default. The nonce is printed on every public board page, so no login is needed. CVSS 9.8, reported by Osman Hussein via Wordfence, published 2026-10-15. Remote code execution on the web server is possible. No known exploitation or public PoC yet.","severity":"critical","cvss":9.8,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Mang Board (mangboard)","fixed":["2.4.5"],"affected":"<= 2.4.4","ecosystem":"wordpress"}],"ecosystems":[],"tags":["file-upload","mang-board","mangboard","package","rce","self-hosted","unauthenticated","wordpress"],"not_affected_if":["guest-posts-disabled","managed-hosting","plugin-not-installed","version->=2.4.5"],"how_to_check":"Plugin folder is wp-content/plugins/mangboard. Run: wp plugin list --name=mangboard --fields=name,version,status. Or check Plugins in wp-admin. Version <= 2.4.4 is vulnerable. Also check the board setting for guest posts (default on). Look for unexpected script files (.php, .phtml) under wp-content/uploads and the mangboard upload dirs.","fix":"Update Mang Board to 2.4.5 or later; wp.org currently ships 2.4.6 (wp plugin update mangboard). The wp.org changelog uses dual numbering like '2.5.6 (2.4.5)'. Until patched, deactivate the plugin, or disable guest posting and block PHP execution in uploads directories. If a site was exposed, hunt for webshells and rotate credentials.","status":"open","published_at":"2026-10-16T05:17:29+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","triaged_at":"2026-10-23T22:05:12+00:00","updated_at":"2026-10-23T23:34:20+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-23T22:05:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","impact":"high","summary":"The Mang Board WordPress plugin version 2.4.4 lets unauthenticated visitors upload arbitrary files through its mbw_file_upload function because the image_path parameter skips the extension allowlist. An attacker can upload an executable file and run code on the web server.","category":"package","who_cares":["wordpress","mang-board","self-hosted"],"confidence":0.8,"needs_auth":"no","worst_case":"Unauthenticated attackers upload executable files and run code on the server","analyst_note":"Fixed version and vendor patch status are not in the sources; check the NVD entry and the plugin's WordPress.org page for a patched release.","how_to_check":"Check whether the Mang Board plugin is installed and at version 2.4.4 in the WordPress plugins directory (wp-content/plugins/).\nIn WordPress admin, look at Plugins for Mang Board and its installed version.\nunknown","needs_analyst":true,"not_affected_if":["plugin-not-installed","guest-posts-disabled"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"critical"},"cost_usd":0.000493,"input_tokens":2882,"output_tokens":409,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Fixed version and vendor patch status are not in the sources; check the NVD entry and the plugin's WordPress.org page for a patched release.","search":"'-10':109B '-109219':23A,26A '-15':110B '-2026':22A,25A '2.4.4':15A,46B,141C '2026':108B '9.8':100B 'allow':210C 'allowlist':70B,173C 'appli':174C 'arbitrari':10A,55B,136C 'attack':159C,188C 'attacker-suppli':158C 'basenam':166C 'basename-deriv':165C 'board':3A,28A,35B,45B,92B,129C,205C,228C 'bypass':67B,170C 'code':112B,199C 'configur':208C 'cover':73B 'cve':21A,24A 'cvss':99B 'default':84B,218C 'deriv':167C 'due':150C 'enabl':80B 'everi':90B,226C 'execut':113B,195C,200C 'exploit':76B,122B,202C 'extens':69B,154C,172C 'file':11A,19A,31B,56B,61B,74B,137C,145C,153C,168C,179C,191C 'file-upload':30B 'function':147C 'guest':78B,211C 'host':41B 'hussein':104B 'imag':64B,161C 'includ':57B 'known':121B 'let':51B 'login':96B,240C 'make':183C,197C,230C 'mang':2A,27A,34B,44B,128C 'mang-board':33B 'mangboard':29A,36B,50B 'may':193C 'mbw':18A,60B,144C 'miss':152C 'mode':219C 'name':75B,169C,180C 'need':77B,98B 'nonc':86B,222C 'osman':103B 'packag':37B 'page':93B,229C 'paramet':66B,163C,181C 'path':65B,162C 'php':58B 'plugin':4A,48B,130C,216C 'poc':125B 'possibl':119B,185C,201C 'post':79B,212C 'print':88B,224C 'public':91B,124B,227C 'publish':107B 'rce':38B 'readabl':232C 'remot':111B,198C 'report':101B 'requir':203C,221C 'self':40B 'self-host':39B 'separ':178C 'server':117B 'slug':49B 'suppli':160C 'unauthent':42B,52B,187C,235C 'upload':12A,20A,32B,54B,62B,138C,146C,190C 'valid':155C 'version':14A,140C 'via':16A,59B,105B,142C 'visitor':53B,236C 'vulner':8A,134C 'web':116B 'whose':164C 'without':237C 'wordfenc':106B 'wordpress':6A,43B,47B,132C,239C 'yet':126B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T05:17:29+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109219","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109219","severity":null,"published_at":"2026-10-16T05:17:29+00:00","modified_at":"2026-10-23T19:17:41+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-109219:470","url":null,"severity":null,"published_at":"2026-10-23T23:34:20+00:00","modified_at":"2026-10-23T23:34:20+00:00","first_seen_at":"2026-10-23T23:34:20+00:00","fetched_at":"2026-10-23T23:34:20+00:00","note":"CVE record + WordPress.org changelog read. Fix: 2.4.5 per a secondary tracker (intelligent-pixel) and changelog security entries; wp.org current is 2.4.6. Not exploited, no public PoC found (KEV no, EPSS ~1%). Did not search X/HN."}],"documents":[{"id":2044,"url":"https://wordpress.org/plugins/mangboard/","title":"Mang Board - WordPress.org plugin page and changelog","kind":"release","source":"analyst","text":null,"published_at":null,"relation":"fix","confidence":null,"note":null},{"id":2049,"url":"https://www.cve.org/CVERecord?id=CVE-2026-109219","title":"CVE Record: CVE-2026-109219","kind":"advisory","source":"analyst","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":null},{"id":2047,"url":"https://wordsec.net/vulnerabilities/plugins/mangboard","title":"WordSec: Mang Board vulnerabilities (Wordfence-sourced, reporter Osman Hussein)","kind":"other","source":"analyst","text":null,"published_at":null,"relation":"mentions","confidence":null,"note":null}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}