{"id":"CVE-2026-127206","kind":"vulnerability","aliases":["CVE-2026-127206"],"related":[],"title":"WordPress Image CAPTCHA plugin: hardcoded answer lets bots pass contact forms","description":"Image CAPTCHA for Contact Form 7 and WPForms through 3.3.29 contains a CAPTCHA bypass vulnerability that allows unauthenticated attackers to defeat the anti-automation control by exploiting a hardcoded static answer in the Contact Form 7 integration. Attackers can submit kc_captcha=kc_human to pass validation in cf7ic_check_if_spam() on every protected form, enabling automated contact-form spam and abuse of actions gated only by this CAPTCHA.","summary":"Image CAPTCHA for Contact Form 7 and WPForms through version 3.3.29 has a hardcoded static answer in its Contact Form 7 integration. An unauthenticated attacker can submit the value kc_captcha=kc_human to pass the check on every protected form, letting automated spam through.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["contact-form-7","package","self-hosted","wordpress","wpforms"],"not_affected_if":["no-cf7-integration","plugin-not-installed"],"how_to_check":"- Look for the Image CAPTCHA plugin in the WordPress admin plugin list and note its version.\n- Check whether Contact Form 7 or WPForms forms on the site use the Image CAPTCHA integration.","fix":"- Image CAPTCHA for Contact Form 7 and WPForms: a fixed version is not stated in the sources; unknown.","status":"open","published_at":"2026-11-12T21:17:22+00:00","first_seen_at":"2026-11-12T21:40:31+00:00","triaged_at":"2026-11-12T21:42:23+00:00","updated_at":"2026-11-12T21:42:23+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-12T21:42:23Z","model":"claude-haiku-5-5","output":{"fix":"- Image CAPTCHA for Contact Form 7 and WPForms: a fixed version is not stated in the sources; unknown.","reach":"internet","title":"WordPress Image CAPTCHA plugin: hardcoded answer lets bots pass contact forms","impact":"low","summary":"Image CAPTCHA for Contact Form 7 and WPForms through version 3.3.29 has a hardcoded static answer in its Contact Form 7 integration. An unauthenticated attacker can submit the value kc_captcha=kc_human to pass the check on every protected form, letting automated spam through.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","contact-form-7","wpforms","self-hosted"],"confidence":0.7,"fix_status":"unknown","needs_auth":"no","worst_case":"Bots bypass the CAPTCHA and flood protected contact forms with spam.","analyst_note":"Confirm the fixed version and whether the WPForms path is affected at https://nvd.nist.gov/vuln/detail/CVE-2026-127206.\n","how_to_check":"- Look for the Image CAPTCHA plugin in the WordPress admin plugin list and note its version.\n- Check whether Contact Form 7 or WPForms forms on the site use the Image CAPTCHA integration.\n- unknown for any check against the plugin's own files, as the sources do not give file paths.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["plugin-not-installed","no-cf7-integration"],"who_is_affected":"Sites running the Image CAPTCHA plugin through version 3.3.29 with the Contact Form 7 integration active are exposed, because the bypass sits in the check that runs on every protected form. Sites without this plugin or without the Contact Form 7 integration can skip it. The sources do not say whether WPForms forms are affected by the same hardcoded value.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000815,"input_tokens":4663,"output_tokens":698,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-127206':14A,17A '-2026':13A,16A '3.3.29':38B,81C '7':21B,33B,48B,77C,108C 'abus':136C 'action':138C 'allow':88C 'answer':6A,43B,103C 'anti':95C 'anti-autom':94C 'attack':52B,90C,110C 'autom':70B,96C,130C 'bot':8A 'bypass':85C 'captcha':3A,29B,58B,73C,84C,114C,143C 'cf7ic':121C 'check':64B,122C 'contact':10A,19B,31B,46B,75C,106C,132C 'contact-form':18B,131C 'contain':82C 'control':97C 'cve':12A,15A 'defeat':92C 'enabl':129C 'everi':66B,126C 'exploit':99C 'form':11A,20B,32B,47B,68B,76C,107C,128C,133C 'gate':139C 'hardcod':5A,41B,101C 'host':25B 'human':60B,116C 'imag':2A,28B,72C 'integr':49B,109C 'kc':57B,59B,113C,115C 'let':7A,69B 'packag':22B 'pass':9A,62B,118C 'plugin':4A 'protect':67B,127C 'self':24B 'self-host':23B 'spam':71B,124C,134C 'static':42B,102C 'submit':54B,112C 'unauthent':51B,89C 'valid':119C 'valu':56B 'version':37B 'vulner':86C 'wordpress':1A,26B 'wpform':27B,35B,79C","nicknames":[],"mitigations":[],"who_affected":"Sites running the Image CAPTCHA plugin through version 3.3.29 with the Contact Form 7 integration active are exposed, because the bypass sits in the check that runs on every protected form. Sites without this plugin or without the Contact Form 7 integration can skip it. The sources do not say whether WPForms forms are affected by the same hardcoded value.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["contactform7","medium","package","selfhosted","wordpress","wpforms"],"campaign_type":null,"search_a":"'-127206':14A,17A '-2026':13A,16A 'answer':6A 'bot':8A 'captcha':3A 'contact':10A 'cve':12A,15A 'form':11A 'hardcod':5A 'imag':2A 'let':7A 'pass':9A 'plugin':4A 'wordpress':1A","search_b":"'3.3.29':38B '7':21B,33B,48B 'answer':43B 'attack':52B 'autom':70B 'captcha':29B,58B 'check':64B 'contact':19B,31B,46B 'contact-form':18B 'everi':66B 'form':20B,32B,47B,68B 'hardcod':41B 'host':25B 'human':60B 'imag':28B 'integr':49B 'kc':57B,59B 'let':69B 'packag':22B 'pass':62B 'protect':67B 'self':24B 'self-host':23B 'spam':71B 'static':42B 'submit':54B 'unauthent':51B 'valu':56B 'version':37B 'wordpress':26B 'wpform':27B,35B","search_c":"'3.3.29':81C '7':77C,108C 'abus':136C 'action':138C 'allow':88C 'answer':103C 'anti':95C 'anti-autom':94C 'attack':90C,110C 'autom':96C,130C 'bypass':85C 'captcha':73C,84C,114C,143C 'cf7ic':121C 'check':122C 'contact':75C,106C,132C 'contact-form':131C 'contain':82C 'control':97C 'defeat':92C 'enabl':129C 'everi':126C 'exploit':99C 'form':76C,107C,128C,133C 'gate':139C 'hardcod':101C 'human':116C 'imag':72C 'integr':109C 'kc':113C,115C 'pass':118C 'protect':127C 'spam':124C,134C 'static':102C 'submit':112C 'unauthent':89C 'valid':119C 'vulner':86C 'wpform':79C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-12T21:17:22+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-127206","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-127206","severity":null,"published_at":"2026-11-12T21:17:22+00:00","modified_at":"2026-11-12T21:36:06+00:00","first_seen_at":"2026-11-12T21:40:31+00:00","fetched_at":"2026-11-12T21:40:31+00:00","note":null}],"documents":[{"id":139270,"url":"https://www.vulncheck.com/advisories/image-captcha-for-contact-form-7-and-wpforms-captcha-bypass","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"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"}