{"id":"CVE-2025-27915","aliases":[],"url":"https://o3.security/vulnerability/CVE-2025-27915","summary":null,"details":"An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its embedded JavaScript executes via an ontoggle event inside a <details> tag. This allows an attacker to run arbitrary JavaScript within the victim's session, potentially leading to unauthorized actions such as setting e-mail filters to redirect messages to an attacker-controlled address. As a result, an attacker can perform unauthorized actions on the victim's account, including e-mail redirection and data exfiltration.","published":"2025-03-12T00:00:00Z","modified":"2026-09-06T08:09:20.490528Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.03918,"percentile":0.89645,"asOf":"2026-09-08"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://wiki.zimbra.com/wiki/Security_Center"},{"type":"WEB","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.13#Security_Fixes"},{"type":"WEB","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.5#Security_Fixes"},{"type":"WEB","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P44#Security_Fixes"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27915"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27915.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27915"},{"type":"ARTICLE","url":"https://strikeready.com/blog/0day-ics-attack-in-the-wild/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-06T08:09:20.490528Z"}}