CVE-2026-10632highCWE-79

CVE-2026-10632: high-severity vulnerability in Zimbra Collaboration Suite

Zimbra Collaboration Suite Classic Web Client Reflected Cross-Site Scripting via Document Editor Packages Parameter

Published · Updated

Follow this CVE+ Monitor Zimbra Collaboration Suite

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.3%
A reflected cross-site scripting vulnerability in the Classic Web Client of Zimbra Collaboration Suite (ZCS) allows an attacker to inject JavaScript through the packages parameter of the /h/rest document editor. The editor inserts package names into script attributes without HTML encoding. When combined with CVE-2026-50053, an attacker with an ordinary Zimbra account can supply their own authentication token and document identifiers in a URL and execute JavaScript in another signed-in user's Zimbra browser session when that user opens the URL. This permits reading mailbox data and performing authenticated actions as the victim. The issue affects ZCS 10.1.16 and was remediated in 10.1.17.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Affected products
Zimbra · Zimbra Collaboration Suite
Related CVEs — Zimbra Collaboration Suite

In the same product, most dangerous first.

CVE-2026-115785MEDIUMZimbra Collaboration Suite Data Source Test SMTP Command Injection via Unsanitized Email AddressEPSS 0.7%CVE-2026-93639HIGHZimbra Collaboration Suite Missing Authorization in ConfigureZimlet Enables Delegated Administrator Privilege EscalationEPSS 0.4%CVE-2026-115786MEDIUMZimbra Collaboration Suite Shared-File Mailbox Quota Accounting Error Enables Quota ExhaustionEPSS 0.4%CVE-2026-50055MEDIUMZimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable ExpansionEPSS 0.4%CVE-2026-50056HIGHZimbra Collaboration Suite Local Privilege Escalation via zmmailboxdmgr JVM Argument InjectionEPSS 0.3%CVE-2026-93636MEDIUMZimbra Collaboration Suite LDAP Filter Injection via Calendar Resource Attribute NameEPSS 0.3%