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CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.
CISA KEV listing collected · added 19 Apr 2022 · Synacor · Zimbra Collaboration Suite (ZCS)
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.
CISA source · CISA-cited reference
EPSS unknown / outside the collected prediction scope.
Observed 23 Oct 2026 16:01:26 UTC · Complete immutable risk JSON
Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.
Original source record · Cite this exact observation · Complete original publisher JSON
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