CVE-2020-7796Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability

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

9.8 CRITICALEPSS 93.59%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 03:25 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Feb 18, 2020
Assigner: mitre

Affected

zimbra collaboration suite (synacor)

Versions: before 8.8.15 · 8.8.15
Fixed in: 8.8.15

All affected versions →

Exploitation

Public exploit: None listed
CISA KEV: Listed · Feb 17, 2026
KEV due date: Mar 10, 2026
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

93.59%chance of exploitation in 30 days

Higher than 99.84% of CVEs

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

6.8Medium

AV:N/AC:M/Au:N/C:P/I:P/A:P

Attack vector: Network
Attack complexity: Medium
Authentication: None
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8	MEDIUM	2.0NVD	AV:N/AC:M/Au:N/C:P/I:P/A:P

CISA required action

⚡ Known exploited · remediation due Mar 10, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2020-7796
Status: Analyzed
Assigner (CNA): mitre
Published: Feb 18, 2020
Last modified: 2026-06-17 03:25 UTC
Weaknesses: CWE-918

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 09:43 UTC.