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CVE-2020-7796

CRITICAL
9.8
CVSS Score
Published: February 18, 2020 at 09:14 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
2 products affected across 1 vendorZimbra Collaboration SuiteCollaboration

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 94%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score93.6%

EPSS (Exploit Prediction Scoring System) estimates a 93.6% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery vulnerability if WebEx zimlet installed and zimlet JSP is enabled.

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.
Ransomware Use
Unknown
Added to KEV
Feb 17, 2026
Remediation Due
Mar 10, 2026
232 days overdue
Notes
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7
https://nvd.nist.gov/vuln/detail/CVE-2020-7796

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zimbra Collaboration Suite· Synacor
95%
v < 8.8.158.8.158.8.15 p18.8.15 p28.8.15 p38.8.15 p48.8.15 p58.8.15 p6
Affected range stops below 8.8.15, so it looks safe — our inference, not a vendor statement
Collaboration· Synacor
75%
v < 8.8.158.8.158.8.15 p18.8.15 p28.8.15 p38.8.15 p48.8.15 p58.8.15 p6
Affected range stops below 8.8.15, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-7796

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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