CVE-2024-27443
critical-risk
Published 2024-08-12
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.
Do I need to act?
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32.4% chance of exploitation in next 30 days
EPSS score — higher than 68% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10
Medium
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (4)
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-...
Press/Media Coverage
https://www.welivesecurity.com/en/eset-research/operation-roundpress/
70
/ 100
critical-risk
Severity
23/34 · High
Exploitability
23/34 · High
Exposure
24/34 · High