CVE-2024-27443

Known Exploited

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 12.74% Top 10%
KEV Since 
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.7#Security_Fixes release notes
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P39#Security_Fixes release notes
https://www.welivesecurity.com/en/eset-research/operation-roundpress/ press/media coverage

Frequently Asked Questions

What is the severity of CVE-2024-27443?
CVE-2024-27443 has been scored as a medium severity vulnerability.
How to fix CVE-2024-27443?
To fix CVE-2024-27443, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-27443 being actively exploited in the wild?
It is confirmed that CVE-2024-27443 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~13% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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