UpHeron
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Servers and applications

CVE-2020-7796

Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 17 Feb 2026.

Severity
Critical 9.8
Published
18 Feb 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.8.15
Sources
NVD

Affected software

SoftwareAffected versions
Zimbra CollaborationServers and applications · cpe:a:synacor:zimbra_collaboration_suite
  • Version 8.8.15-p6
  • Version 8.8.15-p5
  • Version 8.8.15-p4
  • Version 8.8.15-p3
All 8 release lines
  • Every version before 8.8.15
  • Version 8.8.15
  • Version 8.8.15-p1
  • Version 8.8.15-p2
  • Version 8.8.15-p3
  • Version 8.8.15-p4
  • Version 8.8.15-p5
  • Version 8.8.15-p6

Known exploited

CISA name
Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
Required action
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 for US agencies
10 Mar 2026
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-7796
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-7796