{"cve_id":"CVE-2025-66376","published":"2026-01-05T15:15:44.903000+00:00","last_modified":"2026-10-07T10:10:00.213000+00:00","vuln_status":"Analyzed","description":"Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","base_score":6.1,"base_severity":"MEDIUM","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"CHANGED","impact_c":"LOW","impact_i":"LOW","impact_a":"NONE","cwe_ids":["CWE-79"],"in_kev":true,"kev_date_added":"2026-03-18","kev_ransomware":false,"epss_score":0.20227,"epss_percentile":0.97467,"cap_rule_version":"0.1.1","stage":"CRED_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"NONE","caps":["CRED_ACCESS","INFO_DISCLOSURE","TAMPER"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-08T03:18:57.604631+00:00","first_seen":"2026-01-05T15:15:44.903000+00:00","kev_first_seen":"2026-03-18T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["synacor"],"products":["zimbra_collaboration_suite"],"affected":[{"vendor":"synacor","product":"zimbra_collaboration_suite","ranges":["≥ 10.0.0 and < 10.0.18","≥ 10.1.0 and < 10.1.13"]}]}