PT-2026-26614 · Zimbra · Zimbra Collaboration

Published 2026-02-04 · Updated 2026-03-22 · CVE-2026-33370

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions Zimbra Collaboration (ZCS) versions 10.0 and 10.1

Description A stored cross-site scripting (XSS) issue exists in the Zimbra Briefcase feature because of inadequate sanitization of certain uploaded file types. When a user opens a publicly shared Briefcase file containing malicious scripts, the embedded JavaScript executes within the user’s session. This could allow an attacker to execute arbitrary scripts, potentially resulting in data exfiltration or other unauthorized actions performed as the victim user.

Recommendations Update to a newer version that contains a fix for this vulnerability.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2026-07902

CVE-2026-33370

Affected Products

Zimbra Collaboration

References · 7

• https://wiki.zimbra.com/wiki/Security_Center · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07902 · Security Note
• https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33370 · Security Note
• https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes · Note
• https://twitter.com/CVEnew/status/2035627038166351956 · Twitter Post
• https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy · Note