{"id":"CVE-2023-24955","kind":"vulnerability","aliases":["CVE-2023-24955"],"related":[],"title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Microsoft SharePoint Server has a code injection flaw that lets a user with Site Owner rights run code on the server. CISA lists it as actively exploited, and the tags mark it as used in ransomware campaigns.","severity":"high","cvss":7.2,"epss":null,"exploited":true,"exploited_at":"2024-03-26T00:00:00+00:00","products":[{"name":"Microsoft SharePoint Server","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"microsoft sharepoint enterprise server","fixed":[],"affected":"= 2016","ecosystem":"vendor"},{"name":"microsoft sharepoint server","fixed":[],"affected":"= 2019","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","on-prem","package","ransomware","sharepoint","windows"],"not_affected_if":["auth-required","sharepoint-online"],"how_to_check":null,"fix":"Apply Microsoft's mitigations per vendor instructions, or stop using the product if mitigations are unavailable (per CISA required action). Specific patch versions: unknown.","status":"open","published_at":"2023-05-09T18:15:13+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:00:53+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T21:00:53Z","model":"claude-haiku-5-5","output":{"fix":"Apply Microsoft's mitigations per vendor instructions, or stop using the product if mitigations are unavailable (per CISA required action). Specific patch versions: unknown.","reach":"network","impact":"high","summary":"Microsoft SharePoint Server has a code injection flaw that lets a user with Site Owner rights run code on the server. CISA lists it as actively exploited, and the tags mark it as used in ransomware campaigns.","category":"package","who_cares":["sharepoint","on-prem","windows"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker with Site Owner rights runs code on the SharePoint server.","analyst_note":"Find Microsoft's advisory for CVE-2023-24955 and record the specific mitigation steps and patched build numbers; the sources here give neither.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["sharepoint-online","auth-required"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000465,"input_tokens":2824,"output_tokens":366,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':9A,12A '-24955':10A,13A 'action':92C 'activ':57B 'allow':78C 'appli':93C 'attack':81C 'authent':80C 'campaign':68B 'cisa':53B,90C 'code':5A,37B,49B,74C,88C 'contain':72C 'cve':8A,11A 'discontinu':99C 'enterprise':19A 'execut':6A,87C 'exploit':24B,58B 'flaw':39B 'inject':38B,75C 'instruct':97C 'let':41B 'list':54B 'mark':62B 'microsoft':1A,14A,17A,21A,32B,69C 'mitig':94C,105C 'on-prem':25B 'owner':46B,84C 'packag':28B 'per':95C 'prem':27B 'privileg':85C 'product':103C 'ransomwar':29B,67B 'remot':4A,89C 'requir':91C 'right':47B 'run':48B 'server':3A,16A,20A,23A,34B,52B,71C 'sharepoint':2A,15A,18A,22A,30B,33B,70C 'site':45B,83C 'tag':61B 'unavail':107C 'use':65B,100C 'user':43B 'vendor':96C 'vulner':7A,76C 'window':31B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-05-09T18:15:13+00:00","kev":{"dateAdded":"2024-03-26","dueDate":"2024-04-16","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-24955","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-24955","severity":null,"published_at":"2024-03-26T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-24955","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-24955","severity":null,"published_at":"2023-05-09T18:15:13+00:00","modified_at":"2026-06-17T05:40:22+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}