CVE-2026-10632 Zimbra Collaboration Suite - Reflected XSS

Zimbra Collaboration Suite 10.1.16 contains a reflected XSS caused by improper HTML encoding of the packages parameter in /h/rest document editor, letting attackers inject JavaScript to execute in another user's session, exploit requires victim to open crafted URL.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.42% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Reflected XSS
Impact
Client Script Exec, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-79

Vendor fix

Upgrade to version 10.1.17 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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