CVE-2023-43102

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-07 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in Zimbra Collaboration (ZCS) before 10.0.4. An XSS issue can be exploited to access the mailbox of an authenticated user. This is also fixed in 8.8.15 Patch 43 and 9.0.0 Patch 36.

Affected products

Zimbra Collaboration: before 8.8.15; from 10.0.0 before 10.0.4; 8.8.15, 8.8.15-p1, 8.8.15-p10, 8.8.15-p11, 8.8.15-p12, 8.8.15-p13 (+65) — fixed in 10.0.4, 8.8.15

How to fix

Upgrade to a fixed version: Zimbra Collaboration 10.0.4, 8.8.15. Check the vendor advisory for mitigations.

References

https://wiki.zimbra.com/wiki/Security_Center
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://wiki.zimbra.com/wiki/Security_Center
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

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