{"id":"CVE-2026-94268","kind":"vulnerability","aliases":["CVE-2026-94268"],"related":[],"title":"WordPress ACF Extended plugin: unauthenticated visitors can take over admin accounts","description":"The Advanced Custom Fields: Extended WordPress plugin before 0.9.2.8, Advanced Custom Fields: Extended PRO WordPress plugin before 0.9.2.8 does not resolve the target of the update-user action in its front-end Forms module consistently between the stage that authorises the request and the stage that carries it out, which allows unauthenticated visitors to bypass the guard protecting administrator accounts, take over the site administrator's account and be issued a valid session for it. Exploitation requires the site to publish two separate front-end form configurations whose targets are mapped to visitor-submitted values.","summary":"The Advanced Custom Fields: Extended plugin and its PRO edition, before 0.9.2.8, mishandle the update-user action in the front-end Forms module. An unauthenticated visitor can bypass the guard on administrator accounts, take over the site administrator's account and receive a valid session for it.","severity":"high","cvss":8.1,"epss":0.00178,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","self-hosted","wordpress","wordpress-plugins"],"not_affected_if":["fixed-version","no-frontend-forms"],"how_to_check":"- Check the installed version of Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO in the WordPress plugins screen; versions below `0.9.2.8` are affected.\n- Check whether front-end forms are configured to update users, with two separate form configurations whose targets are mapped to visitor-submitted values (unknown whether other configurations are safe).","fix":"- Update Advanced Custom Fields: Extended to `0.9.2.8` or later.\n- Update Advanced Custom Fields: Extended PRO to `0.9.2.8` or later.","status":"open","published_at":"2026-10-23T06:17:08+00:00","first_seen_at":"2026-10-23T21:57:32+00:00","triaged_at":"2026-10-25T03:05:46+00:00","updated_at":"2026-10-25T03:05:46+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T03:05:46Z","model":"claude-haiku-5-5","output":{"fix":"- Update Advanced Custom Fields: Extended to `0.9.2.8` or later.\n- Update Advanced Custom Fields: Extended PRO to `0.9.2.8` or later.","reach":"internet","title":"WordPress ACF Extended plugin: unauthenticated visitors can take over admin accounts","impact":"high","summary":"The Advanced Custom Fields: Extended plugin and its PRO edition, before 0.9.2.8, mishandle the update-user action in the front-end Forms module. An unauthenticated visitor can bypass the guard on administrator accounts, take over the site administrator's account and receive a valid session for it.","category":"package","nicknames":[],"who_cares":["wordpress","wordpress-plugins","self-hosted"],"confidence":0.7,"needs_auth":"no","worst_case":"Unauthenticated visitor takes over the site administrator account and session.","analyst_note":"Confirm the exact affected configuration and whether the default install is exposed; check the NVD page at https://nvd.nist.gov/vuln/detail/CVE-2026-94268.","how_to_check":"- Check the installed version of Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO in the WordPress plugins screen; versions below `0.9.2.8` are affected.\n- Check whether front-end forms are configured to update users, with two separate form configurations whose targets are mapped to visitor-submitted values (unknown whether other configurations are safe).","needs_analyst":true,"not_affected_if":["fixed-version","no-frontend-forms"],"who_is_affected":"Sites running the free or PRO Advanced Custom Fields: Extended plugin below `0.9.2.8` that use its front-end Forms module to update users. Exploitation requires the site to publish two separate front-end form configurations whose targets are mapped to visitor-submitted values, so sites without the Forms module or with only one such form are less exposed. Sites on the fixed version or without the Forms module can skip it.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.00071,"input_tokens":3473,"output_tokens":725,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-94268':14A,17A '0.9.2.8':37B,81C,90C 'account':11A,60B,67B,134C,141C 'acf':2A 'action':43B,101C 'admin':10A 'administr':59B,65B,133C,139C 'advanc':27B,74C,82C 'allow':125C 'authoris':114C 'bypass':55B,129C 'carri':121C 'configur':162C 'consist':109C 'custom':28B,75C,83C 'cve':12A,15A 'edit':35B 'end':48B,106C,160C 'exploit':150C 'extend':3A,30B,77C,85C 'field':29B,76C,84C 'form':49B,107C,161C 'front':47B,105C,159C 'front-end':46B,104C,158C 'guard':57B,131C 'host':21B 'issu':144C 'map':166C 'mishandl':38B 'modul':50B,108C 'packag':18B 'plugin':4A,25B,31B,79C,88C 'pro':34B,86C 'protect':132C 'publish':155C 'receiv':69B 'request':116C 'requir':151C 'resolv':93C 'self':20B 'self-host':19B 'separ':157C 'session':72B,147C 'site':64B,138C,153C 'stage':112C,119C 'submit':170C 'take':8A,61B,135C 'target':95C,164C 'two':156C 'unauthent':5A,52B,126C 'updat':41B,99C 'update-us':40B,98C 'user':42B,100C 'valid':71B,146C 'valu':171C 'visitor':6A,53B,127C,169C 'visitor-submit':168C 'whose':163C 'wordpress':1A,22B,24B,78C,87C 'wordpress-plugin':23B","nicknames":[],"mitigations":[],"who_affected":"Sites running the free or PRO Advanced Custom Fields: Extended plugin below `0.9.2.8` that use its front-end Forms module to update users. Exploitation requires the site to publish two separate front-end form configurations whose targets are mapped to visitor-submitted values, so sites without the Forms module or with only one such form are less exposed. Sites on the fixed version or without the Forms module can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-23T06:17:08+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-94268","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94268","severity":null,"published_at":"2026-10-23T06:17:08+00:00","modified_at":"2026-10-23T14:20:57+00:00","first_seen_at":"2026-10-23T21:57:32+00:00","fetched_at":"2026-10-23T22:29:03+00:00","note":null},{"source":"epss","external_id":"CVE-2026-94268","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-94268","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+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"}