Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery (SSRF) vulnerability via the ProxyServlet component.

cat cve-2019-9621.json

Vendor: Synacor
Product: Zimbra Collaboration Suite (ZCS)
CVSS: 7.5
EPSS (exploit probability): 81.0%
Status: kev
CISA patch-by (BOD 22-01): July 28, 2025
Published: July 7, 2025
Source: https://nvd.nist.gov/vuln/detail/CVE-2019-9621

Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery (SSRF) vulnerability via the ProxyServlet component.

Added to CISA’s Known Exploited Vulnerabilities catalog on 2025-07-07. Required action per CISA: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Due date: 2025-07-28.

This is an auto-synced KEV catalog record pending a full 0dayNews write-up — see CISA’s KEV catalog and the NVD record linked above for primary sources.