CVE-2020-7796Known exploitationPublic exploitNetwork attack vector

Unauthenticated SSRF via WebEx zimlet HTTP proxy

Published Feb 18, 2020 · Updated Feb 18, 2026

SSRF in the WebEx zimlet of Zimbra Collaboration Suite before 8.8.15 Patch 7 allows remote attackers to send server-side requests. The enabled httpPost.jsp endpoint treats the companyId parameter as a destination URL and directs the Zimbra server to request it without restricting the target. The WebEx zimlet must be installed and its JSP enabled; exploitation can reach services accessible from the server, including internal endpoints.

CVSS severity9.8
Critical
EPSS probability93.59%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the WebEx zimlet of Zimbra Collaboration Suite before 8.8.15 Patch 7 allows remote attackers to send server-side requests. The enabled httpPost.jsp endpoint treats the companyId parameter as a destination URL and directs the Zimbra server to request it without restricting the target. The WebEx zimlet must be installed and its JSP enabled; exploitation can reach services accessible from the server, including internal endpoints.

The record

CVE
CVE-2020-7796
Published
Feb 18, 2020
Updated
Feb 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2020CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2025Exploitation reportedGreyNoise coordinated SSRF exploitation surge
  3. Feb 17, 2026Exploitation reportedCISA Known Exploited Vulnerabilities listing
  4. Feb 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
9.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20268
Sep 23, 20262
Sep 24, 202610
Sep 25, 202611
Sep 26, 20263
Sep 27, 202615
Sep 28, 20267
Latest reporting daySep 28, 2026
Latest daily unique IPs7
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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