{"id":"CVE-2026-121875","kind":"vulnerability","aliases":["CVE-2026-121875"],"related":[],"title":"Post Duplicator WordPress plugin lets multisite admins grant themselves Super Admin rights","description":"The Post Duplicator WordPress plugin before 3.0.18 does not validate the capabilities assigned to roles through its permissions settings, allowing a site administrator on a multisite network who is not a Super Admin to grant any role arbitrary capabilities, including the network-management capabilities reserved to the Super Admin.","summary":"The Post Duplicator WordPress plugin before 3.0.18 does not validate role capabilities set in its permissions settings. A non-Super Admin on a WordPress multisite network can grant any role arbitrary capabilities, including network-management ones reserved for Super Admin.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["multisite","package","wordpress","wordpress-plugins"],"not_affected_if":["no-multisite","plugin-version-3.0.18-or-later","single-site-wordpress"],"how_to_check":"- Check the installed Post Duplicator version in the WordPress admin plugin list or `wp plugin get post-duplicator --field=version` (unknown if the exact plugin slug differs)\n- Confirm whether the site runs WordPress multisite, since the sources describe the flaw only for multisite networks","fix":"- Post Duplicator `3.0.18` (the plugin is fixed in versions from `3.0.18`, per the advisory description)","status":"open","published_at":"2026-11-09T07:17:29+00:00","first_seen_at":"2026-11-09T07:25:04+00:00","triaged_at":"2026-11-09T07:25:42+00:00","updated_at":"2026-11-09T07:25:42+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-09T07:25:42Z","model":"claude-haiku-5-5","output":{"fix":"- Post Duplicator `3.0.18` (the plugin is fixed in versions from `3.0.18`, per the advisory description)","reach":"network","title":"Post Duplicator WordPress plugin lets multisite admins grant themselves Super Admin rights","impact":"high","summary":"The Post Duplicator WordPress plugin before 3.0.18 does not validate role capabilities set in its permissions settings. A non-Super Admin on a WordPress multisite network can grant any role arbitrary capabilities, including network-management ones reserved for Super Admin.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","multisite","wordpress-plugins"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"A subsite admin gains network-level Super Admin capabilities on the multisite","analyst_note":"Confirm the exact fixed version and the WordPress.org plugin slug from the NVD entry or the plugin changelog; sources only give 'before 3.0.18'.","how_to_check":"- Check the installed Post Duplicator version in the WordPress admin plugin list or `wp plugin get post-duplicator --field=version` (unknown if the exact plugin slug differs)\n- Confirm whether the site runs WordPress multisite, since the sources describe the flaw only for multisite networks","plain_action":"","product_name":"post-duplicator","needs_analyst":true,"not_affected_if":["single-site-wordpress","plugin-version-3.0.18-or-later","no-multisite"],"who_is_affected":"Only WordPress multisite networks running Post Duplicator before 3.0.18 are described as exposed. The attacker must already be a site administrator on a subsite who is not a Super Admin. Single-site WordPress installs are not described as affected by the sources.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000794,"input_tokens":4553,"output_tokens":677,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121875':15A,18A '-2026':14A,17A '3.0.18':31B,73C 'admin':7A,11A,46B,66B,99C,116C 'administr':89C 'allow':86C 'arbitrari':56B,104C 'assign':79C 'capabl':36B,57B,78C,105C,111C 'cve':13A,16A 'duplic':2A,27B,69C 'grant':8A,53B,101C 'includ':58B,106C 'let':5A 'manag':61B,110C 'multisit':6A,19B,50B,92C 'network':51B,60B,93C,109C 'network-manag':59B,108C 'non':44B 'non-sup':43B 'one':62B 'packag':20B 'permiss':40B,84C 'plugin':4A,24B,29B,71C 'post':1A,26B,68C 'reserv':63B,112C 'right':12A 'role':35B,55B,81C,103C 'set':37B,41B,85C 'site':88C 'super':10A,45B,65B,98C,115C 'valid':34B,76C 'wordpress':3A,21B,23B,28B,49B,70C 'wordpress-plugin':22B","nicknames":[],"mitigations":[],"who_affected":"Only WordPress multisite networks running Post Duplicator before 3.0.18 are described as exposed. The attacker must already be a site administrator on a subsite who is not a Super Admin. Single-site WordPress installs are not described as affected by the sources.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","multisite","package","wordpress","wordpressplugins"],"campaign_type":null,"search_a":"'-121875':15A,18A '-2026':14A,17A 'admin':7A,11A 'cve':13A,16A 'duplic':2A 'grant':8A 'let':5A 'multisit':6A 'plugin':4A 'post':1A 'right':12A 'super':10A 'wordpress':3A","search_b":"'3.0.18':31B 'admin':46B,66B 'arbitrari':56B 'capabl':36B,57B 'duplic':27B 'grant':53B 'includ':58B 'manag':61B 'multisit':19B,50B 'network':51B,60B 'network-manag':59B 'non':44B 'non-sup':43B 'one':62B 'packag':20B 'permiss':40B 'plugin':24B,29B 'post':26B 'reserv':63B 'role':35B,55B 'set':37B,41B 'super':45B,65B 'valid':34B 'wordpress':21B,23B,28B,49B 'wordpress-plugin':22B","search_c":"'3.0.18':73C 'admin':99C,116C 'administr':89C 'allow':86C 'arbitrari':104C 'assign':79C 'capabl':78C,105C,111C 'duplic':69C 'grant':101C 'includ':106C 'manag':110C 'multisit':92C 'network':93C,109C 'network-manag':108C 'permiss':84C 'plugin':71C 'post':68C 'reserv':112C 'role':81C,103C 'set':85C 'site':88C 'super':98C,115C 'valid':76C 'wordpress':70C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T07:17:29+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121875","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121875","severity":null,"published_at":"2026-11-09T07:17:29+00:00","modified_at":"2026-11-09T07:17:29+00:00","first_seen_at":"2026-11-09T07:25:04+00:00","fetched_at":"2026-11-09T07:25:04+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}