Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x…
Priority CRITICAL 90Exploited in the wildCWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x before 8.8.10 patch 7 or 8.8.x before 8.8.11 patch 3 allows SSRF via the ProxyServlet component.
Why it matters now
Exploitation Active In CISA KEV since 2025-07-07CISA due date 2025-07-28
EPSS 0.81037 99th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 46
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* | before 8.6.0; 8.7.0 to before 8.7.11; 8.8.0 to before 8.8.9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:-:*:*:*:*:*:* | 8.6.0 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch1:*:*:*:*:*:* | 8.6.0 patch1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch10:*:*:*:*:*:* | 8.6.0 patch10 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch11:*:*:*:*:*:* | 8.6.0 patch11 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch12:*:*:*:*:*:* | 8.6.0 patch12 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch2:*:*:*:*:*:* | 8.6.0 patch2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch3:*:*:*:*:*:* | 8.6.0 patch3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch4:*:*:*:*:*:* | 8.6.0 patch4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch5:*:*:*:*:*:* | 8.6.0 patch5 | Vulnerable | Synacor |
- cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* Versions before 8.6.0; 8.7.0 to before 8.7.11; 8.8.0 to before 8.8.9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:-:*:*:*:*:*:* Versions 8.6.0 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch1:*:*:*:*:*:* Versions 8.6.0 patch1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch10:*:*:*:*:*:* Versions 8.6.0 patch10 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch11:*:*:*:*:*:* Versions 8.6.0 patch11 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch12:*:*:*:*:*:* Versions 8.6.0 patch12 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch2:*:*:*:*:*:* Versions 8.6.0 patch2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch3:*:*:*:*:*:* Versions 8.6.0 patch3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch4:*:*:*:*:*:* Versions 8.6.0 patch4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch5:*:*:*:*:*:* Versions 8.6.0 patch5 Vulnerable ·Synacor
Show 36 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch6:*:*:*:*:*:* | 8.6.0 patch6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch7:*:*:*:*:*:* | 8.6.0 patch7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch8:*:*:*:*:*:* | 8.6.0 patch8 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch9:*:*:*:*:*:* | 8.6.0 patch9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:-:*:*:*:*:*:* | 8.7.11 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch1:*:*:*:*:*:* | 8.7.11 patch1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch10:*:*:*:*:*:* | 8.7.11 patch10 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch2:*:*:*:*:*:* | 8.7.11 patch2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch3:*:*:*:*:*:* | 8.7.11 patch3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch4:*:*:*:*:*:* | 8.7.11 patch4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch5:*:*:*:*:*:* | 8.7.11 patch5 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch6:*:*:*:*:*:* | 8.7.11 patch6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch7:*:*:*:*:*:* | 8.7.11 patch7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch8:*:*:*:*:*:* | 8.7.11 patch8 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch9:*:*:*:*:*:* | 8.7.11 patch9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:-:*:*:*:*:*:* | 8.8.9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:p5:*:*:*:*:*:* | 8.8.9 p5 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch1:*:*:*:*:*:* | 8.8.9 patch1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch2:*:*:*:*:*:* | 8.8.9 patch2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch3:*:*:*:*:*:* | 8.8.9 patch3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch4:*:*:*:*:*:* | 8.8.9 patch4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch6:*:*:*:*:*:* | 8.8.9 patch6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch7:*:*:*:*:*:* | 8.8.9 patch7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch8:*:*:*:*:*:* | 8.8.9 patch8 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch9:*:*:*:*:*:* | 8.8.9 patch9 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:-:*:*:*:*:*:* | 8.8.10 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch1:*:*:*:*:*:* | 8.8.10 patch1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch2:*:*:*:*:*:* | 8.8.10 patch2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch3:*:*:*:*:*:* | 8.8.10 patch3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch4:*:*:*:*:*:* | 8.8.10 patch4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch6:*:*:*:*:*:* | 8.8.10 patch6 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch7:*:*:*:*:*:* | 8.8.10 patch7 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:-:*:*:*:*:*:* | 8.8.11 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch1:*:*:*:*:*:* | 8.8.11 patch1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch2:*:*:*:*:*:* | 8.8.11 patch2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch3:*:*:*:*:*:* | 8.8.11 patch3 | Vulnerable | Synacor |
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch6:*:*:*:*:*:* Versions 8.6.0 patch6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch7:*:*:*:*:*:* Versions 8.6.0 patch7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch8:*:*:*:*:*:* Versions 8.6.0 patch8 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch9:*:*:*:*:*:* Versions 8.6.0 patch9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:-:*:*:*:*:*:* Versions 8.7.11 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch1:*:*:*:*:*:* Versions 8.7.11 patch1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch10:*:*:*:*:*:* Versions 8.7.11 patch10 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch2:*:*:*:*:*:* Versions 8.7.11 patch2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch3:*:*:*:*:*:* Versions 8.7.11 patch3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch4:*:*:*:*:*:* Versions 8.7.11 patch4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch5:*:*:*:*:*:* Versions 8.7.11 patch5 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch6:*:*:*:*:*:* Versions 8.7.11 patch6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch7:*:*:*:*:*:* Versions 8.7.11 patch7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch8:*:*:*:*:*:* Versions 8.7.11 patch8 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11:patch9:*:*:*:*:*:* Versions 8.7.11 patch9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:-:*:*:*:*:*:* Versions 8.8.9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:p5:*:*:*:*:*:* Versions 8.8.9 p5 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch1:*:*:*:*:*:* Versions 8.8.9 patch1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch2:*:*:*:*:*:* Versions 8.8.9 patch2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch3:*:*:*:*:*:* Versions 8.8.9 patch3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch4:*:*:*:*:*:* Versions 8.8.9 patch4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch6:*:*:*:*:*:* Versions 8.8.9 patch6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch7:*:*:*:*:*:* Versions 8.8.9 patch7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch8:*:*:*:*:*:* Versions 8.8.9 patch8 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9:patch9:*:*:*:*:*:* Versions 8.8.9 patch9 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:-:*:*:*:*:*:* Versions 8.8.10 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch1:*:*:*:*:*:* Versions 8.8.10 patch1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch2:*:*:*:*:*:* Versions 8.8.10 patch2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch3:*:*:*:*:*:* Versions 8.8.10 patch3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch4:*:*:*:*:*:* Versions 8.8.10 patch4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch6:*:*:*:*:*:* Versions 8.8.10 patch6 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch7:*:*:*:*:*:* Versions 8.8.10 patch7 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:-:*:*:*:*:*:* Versions 8.8.11 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch1:*:*:*:*:*:* Versions 8.8.11 patch1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch2:*:*:*:*:*:* Versions 8.8.11 patch2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch3:*:*:*:*:*:* Versions 8.8.11 patch3 Vulnerable ·Synacor
Remediation
No fixed version listed by the sources yet.
Timeline
- 2025-07-07 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2019-9621
- 2026-10-03 Alias added: GHSA-gf2h-5qx6-v9fr
References
Exploit 3
Advisory 4
More Synacor Zimbra Collaboration Suite vulnerabilities
- TI-2024-30554 The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before… KEVCVSS 3.1CRITICAL 10.0
- TI-2022-19841 An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. KEVCVSS 3.1CRITICAL 9.8
- TI-2022-17239 Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that… KEVCVSS 3.1CRITICAL 9.8
- TI-2022-10792 Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-06312 Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is… KEVCVSS 3.1CRITICAL 9.8
- TI-2019-07076 mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2019-9621 · CVE Program
- CVE-2019-9621 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-gf2h-5qx6-v9fr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences