{"id":"CVE-2026-108685","kind":"vulnerability","aliases":["CVE-2026-108685"],"related":[],"title":"WP Post Author WordPress plugin lets anonymous users overwrite admin profile","description":"The WP Post Author  WordPress plugin before 4.2.0 does not check that the account was created before updating its profile during front-end registration, allowing unauthenticated users to overwrite the display name, nickname and website of the first user account, which is normally the administrator, when a registration form declares one of those fields.","summary":"The WP Post Author plugin before 4.2.0 does not check whether an account already exists during front-end registration, so it updates the profile of the first user account, normally the administrator. An unauthenticated visitor can overwrite that account's display name, nickname and website when a registration form includes one of those fields.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","self-hosted","wordpress","wp-post-author"],"not_affected_if":["no-front-end-registration","plugin-version-4.2.0-or-later"],"how_to_check":"- Check the installed version of the WP Post Author plugin in the WordPress admin under Plugins; versions before `4.2.0` are affected.\n- Check whether a front-end registration form that submits display name, nickname or website is enabled for the site.","fix":"- WP Post Author plugin: move to `4.2.0` or later.","status":"open","published_at":"2026-10-29T06:17:17+00:00","first_seen_at":"2026-10-29T06:53:12+00:00","triaged_at":"2026-10-29T06:54:59+00:00","updated_at":"2026-10-29T06:54:59+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-29T06:54:59Z","model":"claude-haiku-5-5","output":{"fix":"- WP Post Author plugin: move to `4.2.0` or later.","reach":"internet","title":"WP Post Author WordPress plugin lets anonymous users overwrite admin profile","impact":"medium","summary":"The WP Post Author plugin before 4.2.0 does not check whether an account already exists during front-end registration, so it updates the profile of the first user account, normally the administrator. An unauthenticated visitor can overwrite that account's display name, nickname and website when a registration form includes one of those fields.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","wp-post-author","self-hosted"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Admin account profile overwritten by anonymous visitors","analyst_note":"","how_to_check":"- Check the installed version of the WP Post Author plugin in the WordPress admin under Plugins; versions before `4.2.0` are affected.\n- Check whether a front-end registration form that submits display name, nickname or website is enabled for the site.","plain_action":"","needs_analyst":false,"not_affected_if":["plugin-version-4.2.0-or-later","no-front-end-registration"],"who_is_affected":"Sites running the WP Post Author plugin before 4.2.0 that accept front-end registration with a form declaring display name, nickname or website fields. The risk is to the first user account, which is normally the administrator. Sites without the plugin, or without a registration form that includes those fields, are not described as exposed.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000691,"input_tokens":4111,"output_tokens":560,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-108685':14A,17A '-2026':13A,16A '4.2.0':33B,89C 'account':39B,56B,66B,95C,122C 'admin':10A 'administr':59B,127C 'allow':107C 'alreadi':40B 'anonym':7A 'author':3A,26B,30B,85C 'check':36B,92C 'creat':97C 'cve':12A,15A 'declar':132C 'display':68B,113C 'end':45B,105C 'exist':41B 'field':81B,136C 'first':54B,120C 'form':76B,131C 'front':44B,104C 'front-end':43B,103C 'host':21B 'includ':77B 'let':6A 'name':69B,114C 'nicknam':70B,115C 'normal':57B,125C 'one':78B,133C 'overwrit':9A,64B,111C 'packag':18B 'plugin':5A,31B,87C 'post':2A,25B,29B,84C 'profil':11A,51B,101C 'registr':46B,75B,106C,130C 'self':20B 'self-host':19B 'unauthent':61B,108C 'updat':49B,99C 'user':8A,55B,109C,121C 'visitor':62B 'websit':72B,117C 'whether':37B 'wordpress':4A,22B,86C 'wp':1A,24B,28B,83C 'wp-post-author':23B","nicknames":[],"mitigations":[],"who_affected":"Sites running the WP Post Author plugin before 4.2.0 that accept front-end registration with a form declaring display name, nickname or website fields. The risk is to the first user account, which is normally the administrator. Sites without the plugin, or without a registration form that includes those fields, are not described as exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T06:17:17+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-108685","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108685","severity":null,"published_at":"2026-10-29T06:17:17+00:00","modified_at":"2026-10-29T06:17:17+00:00","first_seen_at":"2026-10-29T06:53:12+00:00","fetched_at":"2026-10-29T06:53:12+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"}