Threat Intelligence / CVE / CVE-2024-27443

CVE-2024-27443

CISA KEV
CVSS 6.1 (MEDIUM) · EPSS 32.4% · Priority 9/10 · Published 2024-08-12

As of 2025-10-31, CVE-2024-27443 is a CVSS 6.1 (MEDIUM-severity) vulnerability. CISA KEV-listed (known exploited). EPSS exploitation probability 32.4%. Threadlinqs Intelligence tracks 1 threat exploiting it.

Last updated: 2025-10-31

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.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-79

Exploitation status

CISA KEV-listed (known exploited)

Threats tracking this CVE

References

Full detection coverage & IOCs for threats exploiting CVE-2024-27443 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.