CVE-2024-27443
CVSS v3
6.1
MEDIUM
EPSS Score
24.6 %
exploit probability, as of 2026-10-19
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2024-27443 yet.
Description
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. A Cross-Site Scripting (XSS) vulnerability exists in the CalendarInvite feature of the Zimbra webmail classic user interface, because of improper input validation in the handling of the calendar header. An attacker can exploit this via an email message containing a crafted calendar header with an embedded XSS payload. When a victim views this message in the Zimbra webmail classic interface, the payload is executed in the context of the victim's session, potentially leading to execution of arbitrary JavaScript code.
CISA Known Exploited Vulnerability
- Date Added
- 2025-05-19
- Patch Due Date
- 2025-06-09
- Ransomware Use
- Unknown
Technical details
- Published
- 2024-08-12
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.