Exploited Vulnerabilities DailyCVE-2024-27443: Synacor Zimbra Collaboration Suite (ZCS)
EPSS23.6%No. 1079 of 1739 in KEV
CVE year2024~1 yrs before listing
Same vendor in KEV19
Same product17
| Field | Value |
|---|---|
| Vendor | Synacor |
| Product | Zimbra Collaboration Suite (ZCS) |
| Name | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability |
| Added to KEV | 2025-05-19 |
| US federal due date | 2025-06-09 |
| Ransomware use | Unknown |
| CWE | CWE-79 |
CISA description
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.
Other entries for this product
| CVE | Vendor / product | Added | EPSS | Ransomware |
|---|---|---|---|---|
| CVE-2026-73570 | Synacor Zimbra Collaboration Suite (ZCS) | 2026-08-21 | 71.6% | Unknown |
| CVE-2025-48700 | Synacor Zimbra Collaboration Suite (ZCS) | 2026-04-20 | 1.7% | Unknown |
| CVE-2025-66376 | Synacor Zimbra Collaboration Suite (ZCS) | 2026-03-18 | 20.2% | Unknown |
| CVE-2025-68645 | Synacor Zimbra Collaboration Suite (ZCS) | 2026-01-22 | 48.8% | Unknown |
| CVE-2025-27915 | Synacor Zimbra Collaboration Suite (ZCS) | 2025-10-07 | 4.0% | Unknown |
| CVE-2019-9621 | Synacor Zimbra Collaboration Suite (ZCS) | 2025-07-07 | 81.0% | Unknown |
| CVE-2023-34192 | Synacor Zimbra Collaboration Suite (ZCS) | 2025-02-25 | 77.2% | Unknown |
| CVE-2024-45519 | Synacor Zimbra Collaboration Suite (ZCS) | 2024-10-03 | 99.9% | Unknown |
| CVE-2023-37580 | Synacor Zimbra Collaboration Suite (ZCS) | 2023-07-27 | 49.0% | Unknown |
| CVE-2022-27926 | Synacor Zimbra Collaboration Suite (ZCS) | 2023-04-03 | 17.6% | Unknown |
| CVE-2022-41352 | Synacor Zimbra Collaboration Suite (ZCS) | 2022-10-20 | 95.4% | Known |
| CVE-2022-37042 | Synacor Zimbra Collaboration Suite (ZCS) | 2022-08-11 | 91.8% | Known |
| CVE-2022-27925 | Synacor Zimbra Collaboration Suite (ZCS) | 2022-08-11 | 98.6% | Known |
| CVE-2022-27924 | Synacor Zimbra Collaboration Suite (ZCS) | 2022-08-04 | 93.9% | Known |
| CVE-2018-6882 | Synacor Zimbra Collaboration Suite (ZCS) | 2022-04-19 | 29.7% | Known |
Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page
A Synacor Zimbra Collaboration Suite (ZCS) vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2025-05-19.