CVE-2026-93641CWE-79cross-site-scripting

CVE-2026-93641

Critical · published September 25, 2026

CVSS v3.1
9.3
EPSS
0%
Percentile
18.7
In the wild
Unconfirmed
What it is

An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00273 · 18.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-25T18:17Z
References (1)
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories · [email protected]
EPSS history
Timeline
  • 27 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 25 SEP 13:55Z
    Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation
    cvelistv5