Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml…
Priority CRITICAL 86Exploited in the wildCWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.
Why it matters now
Exploitation Active In CISA KEV since 2022-04-19CISA due date 2022-05-10Known ransomware use
EPSS 0.29761 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Total
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 · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* | before 8.7.0 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.0:-:*:*:*:*:*:* | 8.7.0 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.0:*:*:*:*:*:*:* | 8.8.0 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.1:*:*:*:*:*:*:* | 8.8.1 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.2:*:*:*:*:*:*:* | 8.8.2 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.3:*:*:*:*:*:*:* | 8.8.3 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.4:*:*:*:*:*:*:* | 8.8.4 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.5:*:*:*:*:*:*:* | 8.8.5 | Vulnerable | Synacor |
| cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.6:*:*:*:*:*:*:* | 8.8.6 | Vulnerable | Synacor |
- cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* Versions before 8.7.0 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.0:-:*:*:*:*:*:* Versions 8.7.0 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.0:*:*:*:*:*:*:* Versions 8.8.0 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.1:*:*:*:*:*:*:* Versions 8.8.1 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.2:*:*:*:*:*:*:* Versions 8.8.2 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.3:*:*:*:*:*:*:* Versions 8.8.3 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.4:*:*:*:*:*:*:* Versions 8.8.4 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.5:*:*:*:*:*:*:* Versions 8.8.5 Vulnerable ·Synacor
- cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.6:*:*:*:*:*:*:* Versions 8.8.6 Vulnerable ·Synacor
Remediation
No fixed version listed by the sources yet.
Timeline
- 2022-04-19 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2018-6882
- 2026-10-03 Alias added: GHSA-3rrv-gxmq-5643
References
Advisory 2
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-2018-6882 · CVE Program
- CVE-2018-6882 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-3rrv-gxmq-5643 · GitHub Advisory Database · CC BY 4.0
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