ClosedPatched

Synacor Zimbra Collaboration Suite (ZCS): Cross-Site Scripting (XSS) (CVE-2022-27926)

Synacor Zimbra Collaboration Suite (ZCS)

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability by allowing an endpoint URL to accept parameters without sanitizing. Added to CISA KEV on 2023-04-03.

Why this severity: CVSS 6.1 (NVD), actively exploited (CISA KEV)

Started: Apr 3, 2023
Closed: Apr 3, 2023
CVE: CVE-2022-27926

Follow this incident

Updated Apr 3, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Apr 3, 2023
CISA added CVE-2022-27926 to the KEV catalog (due 2023-04-24).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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