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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 18, 2020 · Catalog

   Detected

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

2. Feb 17, 2026 · CISA KEV

   Known exploited

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

3. Mar 10, 2026 · CISA KEV

   Remediation due

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

4. Jun 16, 2026 · Catalog

   Updated

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

Affected

• cpe synacor/zimbra collaboration suiteversion unspecified
• cpe synacor/zimbra collaboration suite8.8.15
• vendor Synacor Zimbra Collaboration Suiteversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2020-7796

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

  cisa.gov
• CVE.orgVulnerability recordCVE-2020-7796

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2020-7796

  30-day exploitation probability 84.4%

  first.org
• NIST NVDVulnerability recordCVE-2020-7796

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

  nvd.nist.gov

References

• CISA note · nvd.nist.gov
• CISA note · wiki.zimbra.com
• US Government Resource · cisa.gov