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
- 97.8th percentile (score 0.253, as of
2026-09-16) - NVD CVSS v3.1
- 6.1 (MEDIUM)
- 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.
NVD description
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.