{"id":"CVE-2026-125388","kind":"vulnerability","aliases":["CVE-2026-125388"],"related":[],"title":"Group-Office: authenticated users can export other users' form submissions","description":"Intermesh Group-Office before 6.8.181, 25.0.116, and 26.0.58 contains a missing authorization vulnerability that allows authenticated users to download form reports via api/download.php without permission checks. Attackers can request the business/forms/report blob with a form ID to export every submission as an XLSX file, disclosing submissions they are not permitted to see.","summary":"Group-Office, a business collaboration suite, lets any logged-in user download form reports through api/download.php without permission checks. An attacker can export every form submission as an XLSX file, including submissions they are not allowed to see.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["forms","group-office","other","self-hosted"],"not_affected_if":["unauthenticated-only-access"],"how_to_check":"- Check the installed Group-Office version against the fixed versions below.\n- Look for the `api/download.php` endpoint on your Group-Office server.","fix":"- Group-Office before `6.8.181` is affected; move to `6.8.181` or later on the 6.8 line.\n- Group-Office before `25.0.116` is affected; move to `25.0.116` or later on the 25.0 line.\n- Group-Office before `26.0.58` is affected; move to `26.0.58` or later on the 26.0 line.","status":"open","published_at":"2026-11-10T00:17:12+00:00","first_seen_at":"2026-11-10T00:28:43+00:00","triaged_at":"2026-11-10T00:30:11+00:00","updated_at":"2026-11-10T00:30:11+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-10T00:30:11Z","model":"claude-haiku-5-5","output":{"fix":"- Group-Office before `6.8.181` is affected; move to `6.8.181` or later on the 6.8 line.\n- Group-Office before `25.0.116` is affected; move to `25.0.116` or later on the 25.0 line.\n- Group-Office before `26.0.58` is affected; move to `26.0.58` or later on the 26.0 line.","reach":"network","title":"Group-Office: authenticated users can export other users' form submissions","impact":"medium","summary":"Group-Office, a business collaboration suite, lets any logged-in user download form reports through api/download.php without permission checks. An attacker can export every form submission as an XLSX file, including submissions they are not allowed to see.","audience":"businesses","category":"other","nicknames":[],"who_cares":["group-office","self-hosted","forms"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"Attacker exports other users' form submissions as XLSX files","analyst_note":"","how_to_check":"- Check the installed Group-Office version against the fixed versions below.\n- Look for the `api/download.php` endpoint on your Group-Office server.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["unauthenticated-only-access"],"who_is_affected":"Any Group-Office installation where users have accounts can be exposed, because the flaw needs only an authenticated session and a form ID. Instances with no forms in use, or that are not reachable by users who should not see form data, carry less risk. unknown whether the sources describe a non-default setting.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000748,"input_tokens":4622,"output_tokens":572,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-125388':14A,17A '-2026':13A,16A '25.0.116':72C '26.0.58':74C '6.8.181':71C 'allow':63B,81C 'api/download.php':43B,89C 'attack':48B,93C 'authent':4A,82C 'author':78C 'blob':98C 'busi':30B 'business/forms/report':97C 'check':46B,92C 'collabor':31B 'contain':75C 'cve':12A,15A 'disclos':111C 'download':39B,85C 'everi':51B,105C 'export':7A,50B,104C 'file':57B,110C 'form':10A,18B,40B,52B,86C,101C 'group':2A,20B,27B,68C 'group-offic':1A,19B,26B,67C 'host':25B 'id':102C 'includ':58B 'intermesh':66C 'let':33B 'log':36B 'logged-in':35B 'miss':77C 'offic':3A,21B,28B,69C 'permiss':45B,91C 'permit':116C 'report':41B,87C 'request':95C 'see':65B,118C 'self':24B 'self-host':23B 'submiss':11A,53B,59B,106C,112C 'suit':32B 'user':5A,9A,38B,83C 'via':88C 'vulner':79C 'without':44B,90C 'xlsx':56B,109C","nicknames":[],"mitigations":[],"who_affected":"Any Group-Office installation where users have accounts can be exposed, because the flaw needs only an authenticated session and a form ID. Instances with no forms in use, or that are not reachable by users who should not see form data, carry less risk. unknown whether the sources describe a non-default setting.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["forms","groupoffice","high","other","selfhosted"],"campaign_type":null,"search_a":"'-125388':14A,17A '-2026':13A,16A 'authent':4A 'cve':12A,15A 'export':7A 'form':10A 'group':2A 'group-offic':1A 'offic':3A 'submiss':11A 'user':5A,9A","search_b":"'allow':63B 'api/download.php':43B 'attack':48B 'busi':30B 'check':46B 'collabor':31B 'download':39B 'everi':51B 'export':50B 'file':57B 'form':18B,40B,52B 'group':20B,27B 'group-offic':19B,26B 'host':25B 'includ':58B 'let':33B 'log':36B 'logged-in':35B 'offic':21B,28B 'permiss':45B 'report':41B 'see':65B 'self':24B 'self-host':23B 'submiss':53B,59B 'suit':32B 'user':38B 'without':44B 'xlsx':56B","search_c":"'25.0.116':72C '26.0.58':74C '6.8.181':71C 'allow':81C 'api/download.php':89C 'attack':93C 'authent':82C 'author':78C 'blob':98C 'business/forms/report':97C 'check':92C 'contain':75C 'disclos':111C 'download':85C 'everi':105C 'export':104C 'file':110C 'form':86C,101C 'group':68C 'group-offic':67C 'id':102C 'intermesh':66C 'miss':77C 'offic':69C 'permiss':91C 'permit':116C 'report':87C 'request':95C 'see':118C 'submiss':106C,112C 'user':83C 'via':88C 'vulner':79C 'without':90C 'xlsx':109C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T08:29:38+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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-2026-125388","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-125388","severity":null,"published_at":"2026-11-10T00:17:12+00:00","modified_at":"2026-11-10T00:17:12+00:00","first_seen_at":"2026-11-10T00:28:43+00:00","fetched_at":"2026-11-10T00:28:43+00:00","note":null}],"documents":[{"id":111567,"url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-42qf-m3j9-837r","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-09T08:29:38+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":111568,"url":"https://www.vulncheck.com/advisories/group-office-before-6.8.181-25.0.116-and-26.0.58-missing-authorization-in-forms-report-download","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"}