CVE-2024-27443

MEDIUM CISA KEV EPSS 97.0%
Published Aug 12, 20241y ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Aug 12, 2024 1y ago
Last Modified Jun 17, 2026 2w ago
KEV Listed May 19, 2025 1y ago
KEV Due Jun 9, 2025 387d overdue

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.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

CISA Known Exploited Overdue 387d
Added
May 19, 2025
Due
Jun 9, 2025

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS Exploit Probability
97.0% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 38

VendorProductVersionRange
zimbracollaboration*≥10.0.0  –  <10.0.7
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any
zimbracollaboration9.0.0any

References 4

  • wiki.zimbra.com https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.7#Security_Fixes
    Release Notes
  • wiki.zimbra.com https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P39#Security_Fixes
    Release Notes
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-27443
    US Government Resource
  • welivesecurity.com https://www.welivesecurity.com/en/eset-research/operation-roundpress/
    Press/Media Coverage

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.