{"schema":"threatline.record/2","record":{"id":"CVE-2024-27443","aliases":[],"summary":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","details":"Zimbra Collaboration contains a cross-site scripting (XSS) vulnerability in the CalendarInvite feature of the Zimbra webmail classic user interface. An attacker can exploit this vulnerability via an email message containing a crafted calendar header, leading to the execution of arbitrary JavaScript code.","categories":["Applications & CMS"],"product":"Zimbra Collaboration Suite (ZCS)","vendor":"Synacor","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2024-27443","source_modified_at":"2025-10-21T22:55:48.688Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"n/a","vendor":"n/a","versions":[{"version":"n/a","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.1,"severity":"Medium","kev":{"listed":true,"date_added":"2025-05-19","due_date":"2025-06-09","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.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.24606,"percentile":0.97885,"score_date":"2026-10-23"},"published_at":"2024-08-12T00:00:00.000Z","modified_at":"2025-10-21T22:55:48.688Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2024-27443","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T22:55:48.688Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-27443.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2024-27443","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P46#Security_Fixes","source":"CISA KEV"},{"source":"CVE List","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P39#Security_Fixes"},{"source":"CVE List","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.7#Security_Fixes"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-27443","source":"CISA KEV"},{"source":"CVE List","url":"https://www.welivesecurity.com/en/eset-research/operation-roundpress/","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27443","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2025-05-21T03:55:36.220790Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"Zimbra Collaboration - Cross-Site Scripting (XSS)","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-27443.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T22:55:48.688Z","content_hash":"133fe024949f5b9974e9b5b79186dfc711b750bbc4ecf0c6917ae53bbcfd9ae8"}}