April 19, 2022 · Applied Cybernetics Group
CVE-2018-6882 — Synacor Zimbra Collaboration Suite (ZCS)
known ransomware use
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
- Added to KEV
2022-04-19- Federal due date
2022-05-10- Vendor
- Synacor
- Product
- Zimbra Collaboration Suite (ZCS)
- EPSS
- 99.0th percentile (score 0.770, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2018-6882
CISA short description
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML.
Required action
Apply updates per vendor instructions.