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

> CVE-2020-7796: Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-7796
Last updated: 2026-06-17T03:25:27Z

- Published: 2020-02-18 21:14 UTC · Updated: 2026-06-17 03:25 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 93.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-02-17, federal due date 2026-03-10, ransomware use: Unknown

## Description

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

## CISA 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.

## Affected vendors and products

- Synacor: Zimbra Collaboration Suite

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-7796)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-7796)
- [https://wiki.zimbra.com/wiki/Zimbra\_Releases/8.8.15/P7](https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-7796 · Markdown: https://rewindex.com/cve/CVE-2020-7796.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-7796 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:44.933Z