{"id":"CVE-2026-111303","kind":"vulnerability","aliases":["CVE-2026-111303"],"related":[],"title":"Microsoft SharePoint: cross-site scripting lets an authorized user spoof pages","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.","summary":"Microsoft Office SharePoint does not neutralize input when generating web pages, which is a cross-site scripting flaw. A logged-in attacker over the network can spoof content shown to other users.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Microsoft Office SharePoint","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["microsoft-office","self-hosted","sharepoint","vendor"],"not_affected_if":["sharepoint-online"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T19:18:28+00:00","first_seen_at":"2026-11-10T19:24:29+00:00","triaged_at":"2026-11-10T19:47:42+00:00","updated_at":"2026-11-10T19:47:42+00:00","category":"vendor","confidence":0.5,"triage":{"at":"2026-11-10T19:47:42Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Microsoft SharePoint: cross-site scripting lets an authorized user spoof pages","impact":"medium","summary":"Microsoft Office SharePoint does not neutralize input when generating web pages, which is a cross-site scripting flaw. A logged-in attacker over the network can spoof content shown to other users.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["sharepoint","microsoft-office","self-hosted"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"attacker spoofs page content seen by other users","analyst_note":"Confirm affected SharePoint Server versions and the Microsoft security update that fixes CVE-2026-111303 from the MSRC advisory.","how_to_check":"- unknown","plain_action":"","product_name":"Microsoft Office SharePoint","needs_analyst":true,"not_affected_if":["sharepoint-online"],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000655,"input_tokens":4510,"output_tokens":408,"severity_before":"high"},"analyst_status":"queued","analyst_note":"Confirm affected SharePoint Server versions and the Microsoft security update that fixes CVE-2026-111303 from the MSRC advisory.","search":"'-111303':15A,18A '-2026':14A,17A 'allow':80C 'attack':53B,83C 'author':9A,82C 'content':59B 'cross':4A,45B,73C 'cross-sit':3A,44B,72C 'cve':13A,16A 'flaw':48B 'generat':38B,71C 'host':27B 'improp':64C 'input':36B,67C 'let':7A 'log':51B 'logged-in':50B 'microsoft':1A,19A,23B,30B,77C 'microsoft-offic':22B 'network':56B,89C 'neutral':35B,65C 'offic':24B,31B,78C 'office':20A 'page':12A,40B,70C 'perform':85C 'script':6A,47B,75C 'self':26B 'self-host':25B 'sharepoint':2A,21A,28B,32B,79C 'shown':60B 'site':5A,46B,74C 'spoof':11A,58B,86C 'user':10A,63B 'vendor':29B 'web':39B,69C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":["microsoftofficesharepoint","officesharepoint"],"ptokens":["microsoft","office","sharepoint"],"labels":["high","microsoftoffice","selfhosted","sharepoint","vendor"],"campaign_type":null,"search_a":"'-111303':15A,18A '-2026':14A,17A 'author':9A 'cross':4A 'cross-sit':3A 'cve':13A,16A 'let':7A 'microsoft':1A,19A 'office':20A 'page':12A 'script':6A 'sharepoint':2A,21A 'site':5A 'spoof':11A 'user':10A","search_b":"'attack':53B 'content':59B 'cross':45B 'cross-sit':44B 'flaw':48B 'generat':38B 'host':27B 'input':36B 'log':51B 'logged-in':50B 'microsoft':23B,30B 'microsoft-offic':22B 'network':56B 'neutral':35B 'offic':24B,31B 'page':40B 'script':47B 'self':26B 'self-host':25B 'sharepoint':28B,32B 'shown':60B 'site':46B 'spoof':58B 'user':63B 'vendor':29B 'web':39B","search_c":"'allow':80C 'attack':83C 'author':82C 'cross':73C 'cross-sit':72C 'generat':71C 'improp':64C 'input':67C 'microsoft':77C 'network':89C 'neutral':65C 'offic':78C 'page':70C 'perform':85C 'script':75C 'sharepoint':79C 'site':74C 'spoof':86C 'web':69C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:18:28+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111303","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111303","severity":null,"published_at":"2026-11-10T19:18:28+00:00","modified_at":"2026-11-10T19:18:28+00:00","first_seen_at":"2026-11-10T19:24:29+00:00","fetched_at":"2026-11-10T19:24:29+00:00","note":null}],"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"}