CVE-2024-27443
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
MITRE ATT&CK techniques
How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.
Summary
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.
Affected software
Vendor: Synacor · Product: Zimbra Collaboration Suite (ZCS)
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Synacor
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2019-9670 | Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External En | 100.0% | Yes |
| CVE-2024-45519 | Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability | 99.9% | Yes |
| CVE-2022-27925 | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 98.7% | Yes |
| CVE-2022-41352 | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 95.5% | Yes |
| CVE-2022-27924 | Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability | 93.9% | Yes |
| CVE-2020-7796 | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerabili | 93.6% | Yes |
| CVE-2022-37042 | Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability | 92.1% | Yes |
| CVE-2019-9621 | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vuln | 81.0% | Yes |
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