{"id":"CVE-2023-34192","kind":"vulnerability","aliases":["CVE-2023-34192"],"related":[],"title":"synacor zimbra collaboration suite: Cross Site Scripting vulnerability in Zimbra ZCS v.8.8.15 allows a remote authenticated attacker to execute…","description":"Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability that allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.\n\nCISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","summary":"Zimbra Collaboration Suite has a cross-site scripting flaw in the /h/autoSaveDraft endpoint that lets a logged-in user run script in another user's session. Attackers exploit it in the wild, and the sources say it can lead to arbitrary code execution.","severity":"critical","cvss":9.0,"epss":null,"exploited":true,"exploited_at":"2025-02-25T00:00:00+00:00","products":[{"name":"Synacor Zimbra Collaboration Suite (ZCS)","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"synacor zimbra collaboration suite","fixed":[],"affected":"= 8.8.15","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["email","exploited","package","self-hosted","zimbra"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the mitigations from the vendor (Synacor/Zimbra) as CISA requires; the specific patched version is unknown from these sources.\nIf mitigations are unavailable, CISA says discontinue use of the product.","status":"open","published_at":"2023-07-06T16:15:10+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:52:20+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T20:52:20Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations from the vendor (Synacor/Zimbra) as CISA requires; the specific patched version is unknown from these sources.\nIf mitigations are unavailable, CISA says discontinue use of the product.","reach":"internet","impact":"high","summary":"Zimbra Collaboration Suite has a cross-site scripting flaw in the /h/autoSaveDraft endpoint that lets a logged-in user run script in another user's session. Attackers exploit it in the wild, and the sources say it can lead to arbitrary code execution.","category":"package","who_cares":["zimbra","self-hosted","email"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker runs arbitrary code in victim sessions, possibly reaching the mail server.","analyst_note":"Find the Zimbra vendor advisory and the patched ZCS version for CVE-2023-34192 and confirm the exact code-execution claim.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000475,"input_tokens":2729,"output_tokens":404,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':130C '-2023':21A,24A '-34192':22A,25A '/h/autosavedraft':54B,116C '22':129C 'action':120C 'allow':13A,101C 'anoth':66B 'appli':121C 'applic':127C 'arbitrari':84B,108C 'attack':17A,70B,105C 'authent':16A,104C 'bod':128C 'cisa':118C 'cloud':133C 'code':85B,109C 'collabor':3A,43B,89C 'collaboration':28A,33A 'contain':92C 'craft':112C 'cross':5A,48B,95C 'cross-sit':47B,94C 'cve':20A,23A 'discontinu':136C 'email':35B 'endpoint':55B 'execut':19A,86B,107C 'exploit':36B,71B 'flaw':51B 'follow':126C 'function':117C 'guidanc':131C 'host':40B 'instruct':125C 'lead':82B 'let':57B 'log':60B 'logged-in':59B 'mitig':122C,142C 'packag':37B 'per':123C 'product':140C 'remot':15A,103C 'requir':119C 'run':63B 'say':79B 'script':7A,50B,64B,97C,113C 'self':39B 'self-host':38B 'servic':134C 'session':69B 'site':6A,49B,96C 'sourc':78B 'suit':4A,44B,90C 'suite':29A,34A 'synacor':1A,26A,31A,87C 'unavail':144C 'use':137C 'user':62B,67B 'v.8.8.15':12A 'vendor':124C 'via':110C 'vulner':8A,99C 'wild':75B 'xss':98C 'zcs':11A,30A,91C 'zimbra':2A,10A,27A,32A,41B,42B,88C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-07-06T16:15:10+00:00","kev":{"dateAdded":"2025-02-25","dueDate":"2025-03-18","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-34192","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-34192","severity":null,"published_at":"2025-02-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:22+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-34192","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34192","severity":null,"published_at":"2023-07-06T16:15:10+00:00","modified_at":"2026-06-17T06:03:05+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"}