{"id":"CVE-2026-80095","kind":"vulnerability","aliases":["CVE-2026-80095"],"related":[],"title":"Microsoft SharePoint: cross-site scripting lets an attacker elevate privileges over the network","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","summary":"Microsoft Office SharePoint has a cross-site scripting flaw in how it builds web pages from user input. An attacker with a valid account can reach it over the network and gain higher privileges.","severity":"critical","cvss":9.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["microsoft-office","on-premises","sharepoint","vendor"],"not_affected_if":["sharepoint-online-only"],"how_to_check":"- Confirm whether your organization runs on-premises Microsoft SharePoint Server (Office SharePoint) rather than only SharePoint Online.\n- Check the installed build against the fixed versions in Microsoft's advisory for CVE-2026-80095; the sources here do not list affected version ranges.","fix":null,"status":"open","published_at":"2026-11-10T19:21:22+00:00","first_seen_at":"2026-11-10T19:25:17+00:00","triaged_at":"2026-11-10T19:25:50+00:00","updated_at":"2026-11-10T19:30:07+00:00","category":"vendor","confidence":0.3,"triage":{"at":"2026-11-10T19:25:50Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SharePoint: cross-site scripting lets an attacker elevate privileges over the network","impact":"high","summary":"Microsoft Office SharePoint has a cross-site scripting flaw in how it builds web pages from user input. An attacker with a valid account can reach it over the network and gain higher privileges.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["sharepoint","microsoft-office","on-premises"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"attacker gains elevated privileges over the network","analyst_note":"Find Microsoft's advisory for CVE-2026-80095 to get affected and fixed SharePoint build numbers and whether SharePoint Online is affected.","how_to_check":"- Confirm whether your organization runs on-premises Microsoft SharePoint Server (Office SharePoint) rather than only SharePoint Online.\n- Check the installed build against the fixed versions in Microsoft's advisory for CVE-2026-80095; the sources here do not list affected version ranges.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["sharepoint-online-only"],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000692,"input_tokens":4511,"output_tokens":481,"severity_before":"critical"},"analyst_status":"done","analyst_note":"Find Microsoft's advisory for CVE-2026-80095 to get affected and fixed SharePoint build numbers and whether SharePoint Online is affected.","search":"'-2026':16A,19A '-80095':17A,20A 'account':53B 'allow':80C 'attack':9A,49B,83C 'author':82C 'build':42B 'cross':4A,35B,73C 'cross-sit':3A,34B,72C 'cve':15A,18A 'elev':10A,85C 'flaw':38B 'gain':61B 'generat':71C 'higher':62B 'improp':64C 'input':47B,67C 'let':7A 'microsoft':1A,22B,29B,77C 'microsoft-offic':21B 'network':14A,59B,89C 'neutral':65C 'offic':23B,30B,78C 'on-premis':24B 'page':44B,70C 'premis':26B 'privileg':11A,63B,86C 'reach':55B 'script':6A,37B,75C 'sharepoint':2A,27B,31B,79C 'site':5A,36B,74C 'user':46B 'valid':52B 'vendor':28B 'web':43B,69C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["critical","microsoftoffice","onpremises","sharepoint","vendor"],"campaign_type":null,"search_a":"'-2026':16A,19A '-80095':17A,20A 'attack':9A 'cross':4A 'cross-sit':3A 'cve':15A,18A 'elev':10A 'let':7A 'microsoft':1A 'network':14A 'privileg':11A 'script':6A 'sharepoint':2A 'site':5A","search_b":"'account':53B 'attack':49B 'build':42B 'cross':35B 'cross-sit':34B 'flaw':38B 'gain':61B 'higher':62B 'input':47B 'microsoft':22B,29B 'microsoft-offic':21B 'network':59B 'offic':23B,30B 'on-premis':24B 'page':44B 'premis':26B 'privileg':63B 'reach':55B 'script':37B 'sharepoint':27B,31B 'site':36B 'user':46B 'valid':52B 'vendor':28B 'web':43B","search_c":"'allow':80C 'attack':83C 'author':82C 'cross':73C 'cross-sit':72C 'elev':85C 'generat':71C 'improp':64C 'input':67C 'microsoft':77C 'network':89C 'neutral':65C 'offic':78C 'page':70C 'privileg':86C 'script':75C 'sharepoint':79C 'site':74C 'web':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:21:22+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-80095","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80095","severity":null,"published_at":"2026-11-10T19:21:22+00:00","modified_at":"2026-11-10T19:21:22+00:00","first_seen_at":"2026-11-10T19:25:17+00:00","fetched_at":"2026-11-10T19:25:17+00:00","note":null},{"source":"analyst","external_id":"CVE-2026-80095:2514","url":null,"severity":null,"published_at":"2026-11-10T19:30:07+00:00","modified_at":"2026-11-10T19:30:07+00:00","first_seen_at":"2026-11-10T19:30:07+00:00","fetched_at":"2026-11-10T19:30:07+00:00","note":"CVE published minutes ago; MSRC page is JS-only and returned nothing via web-cli, NVD fetch empty. No primary source read, so no versions, no fix, nothing verified. Revisit when MSRC/KB pages exist (support.microsoft.com KB pages list CVEs)."}],"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"}