{"id":"CVE-2022-24682","kind":"vulnerability","aliases":["CVE-2022-24682"],"related":[],"title":"Synacor Zimbra Collaborate Suite (ZCS): Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability","description":"An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.","summary":"Zimbra Collaboration Suite has a cross-site scripting flaw in its Calendar feature. An attacker can run script in a victim's browser session, which the description says can lead to arbitrary code execution.","severity":"medium","cvss":6.1,"epss":0.30931,"exploited":true,"exploited_at":"2022-02-25T00:00:00+00:00","products":[{"name":"Synacor Zimbra Collaborate Suite (ZCS)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["email","exploited","package","ransomware","self-hosted","zimbra"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the Synacor/Zimbra update per vendor instructions (CISA KEV required action); the fixed version is unknown from the sources.","status":"open","published_at":"2022-02-09T04:15:07+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:26:30+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-10-23T21:26:30Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Synacor/Zimbra update per vendor instructions (CISA KEV required action); the fixed version is unknown from the sources.","reach":"internet","impact":"high","summary":"Zimbra Collaboration Suite has a cross-site scripting flaw in its Calendar feature. An attacker can run script in a victim's browser session, which the description says can lead to arbitrary code execution.","category":"package","who_cares":["zimbra","self-hosted","email"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker runs script in victim sessions, possibly executing arbitrary code","analyst_note":"Confirm affected and fixed Zimbra versions and the Calendar trigger from the vendor advisory; the exploited-in-the-wild status is listed in CISA KEV.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000468,"input_tokens":2897,"output_tokens":357,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2022':17A,20A '-24682':18A,21A '1':89C '2021':98C '30':87C '8.8':82C '8.8.15':85C 'arbitrari':67B,115C 'attack':50B,100C 'attribut':109C 'becom':112C 'browser':58B 'calendar':47B,76C 'caus':114C 'code':68B 'collabor':3A,8A,36B,80C 'collaborate':24A 'contain':104C 'could':101C 'cross':12A,41B 'cross-sit':11A,40B 'cve':16A,19A 'decemb':97C 'descript':62B 'discov':73C 'document':122C 'element':108C 'email':27B 'execut':69B,105C 'exploit':28B,91C 'featur':48B,77C 'flaw':44B 'host':33B 'html':103C 'inject':119C 'insid':107C 'issu':71C 'javascript':106C 'lead':65B 'markup':111C,116C 'packag':29B 'patch':86C 'place':102C 'ransomwar':30B 'run':52B 'say':63B 'script':14A,43B,53B 'self':32B 'self-host':31B 'session':59B 'site':13A,42B 'start':95C 'suit':4A,9A,37B,81C 'suite':25A 'synacor':1A,6A,22A 'unescap':113C 'updat':88C 'victim':56B 'vulner':15A 'wild':94C 'x':83C 'zcs':5A,10A,26A 'zimbra':2A,7A,23A,34B,35B,79C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2022-02-09T04:15:07+00:00","kev":{"dateAdded":"2022-02-25","dueDate":"2022-03-11","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-24682","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-24682","severity":null,"published_at":"2022-02-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:17+00:00","note":null},{"source":"epss","external_id":"CVE-2022-24682","url":"https://api.first.org/data/v1/epss?cve=CVE-2022-24682","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-24682","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-24682","severity":null,"published_at":"2022-02-09T04:15:07+00:00","modified_at":"2026-08-07T05:16:55+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}