{"id":"CVE-2026-109512","kind":"vulnerability","aliases":["CVE-2026-109512"],"related":[],"title":"WordPress Mang Board plugin: stored XSS through the content parameter","description":"The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The sanitization bypass is further compounded by the ability to omit the data_type parameter in a modify request, which skips the HTMLPurifier branch entirely and leaves only mbw_htmlspecialchars2 encoding — fully reversed at render — as the sole barrier.","summary":"The Mang Board plugin for WordPress lets a logged-in subscriber store script in the content parameter, because input is not sanitized and output is not escaped. The injected script runs in the browser of anyone who opens the affected page, including administrators.","severity":"medium","cvss":6.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","php","self-hosted","wordpress"],"not_affected_if":["no-subscriber-accounts","patched-version","plugin-not-installed"],"how_to_check":"- Check whether the Mang Board plugin is installed and its version, in the WordPress admin under Plugins, or with `wp plugin get mang-board --field=version` (plugin slug assumed; confirm in the sources)\n- unknown","fix":"- Update the Mang Board plugin to a version later than `2.4.4`, if the vendor has released one (the sources do not name a fixed version)\n- If no fixed version exists, deactivate the plugin or restrict subscriber accounts until it is patched","status":"open","published_at":"2026-10-16T05:17:29+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","triaged_at":"2026-10-25T03:59:58+00:00","updated_at":"2026-10-25T03:59:58+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:59:58Z","model":"claude-haiku-5-5","output":{"fix":"- Update the Mang Board plugin to a version later than `2.4.4`, if the vendor has released one (the sources do not name a fixed version)\n- If no fixed version exists, deactivate the plugin or restrict subscriber accounts until it is patched","reach":"internet","title":"WordPress Mang Board plugin: stored XSS through the content parameter","impact":"medium","summary":"The Mang Board plugin for WordPress lets a logged-in subscriber store script in the content parameter, because input is not sanitized and output is not escaped. The injected script runs in the browser of anyone who opens the affected page, including administrators.","category":"package","nicknames":[],"who_cares":["wordpress","self-hosted","php"],"confidence":0.6,"needs_auth":"yes","worst_case":"Injected script runs in visitors' browsers and can hijack admin sessions.","analyst_note":"Confirm the patched version and plugin slug from the NVD entry or the WordPress plugin repository changelog; the sources do not give a fix version.","how_to_check":"- Check whether the Mang Board plugin is installed and its version, in the WordPress admin under Plugins, or with `wp plugin get mang-board --field=version` (plugin slug assumed; confirm in the sources)\n- unknown","needs_analyst":true,"not_affected_if":["plugin-not-installed","patched-version","no-subscriber-accounts"],"who_is_affected":"Sites running the Mang Board plugin for WordPress at version `2.4.4` or earlier. Exposure requires that subscriber-level accounts exist and can submit content, so sites with open registration or untrusted users are at higher risk. Sites without the plugin installed are not affected.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000656,"input_tokens":3450,"output_tokens":621,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-109512':13A,16A '-2026':12A,15A '2.4.4':92C 'abil':140C 'access':112C,128C 'administr':66B 'affect':63B 'anyon':59B 'arbitrari':117C 'attack':107C 'authent':106C 'barrier':170C 'board':3A,25B,69C 'branch':155C 'browser':57B 'bypass':134C 'compound':137C 'content':9A,39B,83C 'cross':78C 'cross-sit':77C 'cve':11A,14A 'data':144C 'due':93C 'encod':162C 'entir':156C 'escap':50B,100C 'execut':124C 'fulli':163C 'host':21B 'htmlpurifi':154C 'htmlspecialchars2':161C 'includ':65B,91C 'inject':52B,116C,130C 'input':42B,96C 'insuffici':95C 'leav':158C 'let':29B 'level':111C 'log':32B 'logged-in':31B 'make':102C 'mang':2A,24B,68C 'mbw':160C 'modifi':149C 'omit':142C 'open':61B 'output':47B,99C 'packag':17B 'page':64B,121C,131C 'paramet':10A,40B,84C,146C 'php':18B 'plugin':4A,26B,70C 'possibl':104C 'render':166C 'request':150C 'revers':164C 'run':54B 'sanit':45B,97C,133C 'script':36B,53B,80C,119C 'self':20B 'self-host':19B 'site':79C 'skip':152C 'sole':169C 'store':5A,35B,76C 'subscrib':34B,110C 'subscriber-level':109C 'type':145C 'user':127C 'version':87C 'via':81C 'vulner':74C 'web':118C 'whenev':125C 'wordpress':1A,22B,28B,72C 'xss':6A","nicknames":[],"mitigations":[],"who_affected":"Sites running the Mang Board plugin for WordPress at version `2.4.4` or earlier. Exposure requires that subscriber-level accounts exist and can submit content, so sites with open registration or untrusted users are at higher risk. Sites without the plugin installed are not affected.","tier":"C","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:L/UI:N/S:C/C:L/I:L/A:N","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109512","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109512","severity":null,"published_at":"2026-10-16T05:17:29+00:00","modified_at":"2026-10-16T15:17:07+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}