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[NEW] [high] Synacor Zimbra Classic Web Client: Vulnerability allows cross-site scripting

high
A remote, anonymous attacker can exploit a vulnerability in Synacor Zimbra Classic Web Client to conduct a cross-site scripting attack.

CSIRTS triage

vendor: Synacorproduct: Zimbra Classic Web ClientCross-site scripting
What
A remote, anonymous attacker can exploit a vulnerability in Synacor Zimbra Classic Web Client to conduct a cross-site scripting attack.
Who is affected
Users of Synacor Zimbra Classic Web Client are affected.
Urgency
Remediation is high urgency due to the high severity of the cross-site scripting vulnerability.
Action
Update to the latest version of Zimbra Classic Web Client.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
high
Published
2026-07-07
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2216

More from CERT-Bund (BSI) Security Advisories