Paper/Archive/CVE-2026-93641

CVE-2026-93641

Zimbra Zimbra Collaboration Suite (ZCS) — Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation

EPSS 0.3%CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (CNA)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 19.8.198 × 204.0 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Zimbra Collaboration Suite (ZCS)< 10.1.2110.1.21CNA

Scores by source

rapid7 (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorywiki.zimbra.com/wiki/Zimbra_Security_Advisories