Technology · Synacor
Synacor Zimbra Collaboration Suite vulnerabilities
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Junglewise Threat Intelligence has tracked 24 vulnerabilities in Synacor Zimbra Collaboration Suite: 0 in the last 7 days and 0 in the last 90 days, 9 of them critical and 8 exploited in the wild. The most recent, CVE-2025-48700, was published on 20 April 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 9
- Exploited in the wild
- 8
About Synacor Zimbra Collaboration Suite
An enterprise-grade email and collaboration platform that includes contacts, calendar, and file sharing capabilities.
Latest Synacor Zimbra Collaboration Suite vulnerabilities
- CVE-2025-48700: Synacor Zimbra Collaboration Suite XSS in Classic UIcriticalexploited in the wildCVSS 6.1EPSS 18.8%
- CVE-2025-66376: Synacor Zimbra Collaboration Suite stored XSS in Classic UIcriticalexploited in the wildCVSS 7.2EPSS 10.9%
- CVE-2020-7796: Synacor Zimbra Collaboration Suite SSRF in WebEx zimletcriticalexploited in the wildCVSS 9.8EPSS 92.7%
- CVE-2025-68645: Synacor Zimbra Collaboration Suite file inclusion in RestFilter servletcriticalexploited in the wildCVSS 8.8EPSS 47.7%
- CVE-2025-27915: Synacor Zimbra Collaboration Suite XSS in Classic Web Clientcriticalexploited in the wildCVSS 5.4EPSS 26.1%
- CVE-2019-9621: Synacor Zimbra Collaboration Suite SSRF in ProxyServletcriticalexploited in the wildCVSS 7.5EPSS 94.1%
- CVE-2024-27443: Synacor Zimbra Collaboration Suite XSS in CalendarInvitecriticalexploited in the wildCVSS 6.1EPSS 32.4%
- CVE-2019-9670: Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Referencecriticalexploited in the wildCVSS 9.8
- CVE-2016-4019: Zimbra Collaboration Suite integrity vulnerability via unknown vectorshighCVSS 7.5
- CVE-2016-3999: Zimbra Collaboration multiple XSS vulnerabilitiesmediumCVSS 6.1
- CVE-2016-3415: Zimbra Collaboration deserialization attack via unspecified vectorscriticalCVSS 9.1
- CVE-2016-3414: Zimbra Collaboration denial of service in mailboxdmediumCVSS 6.5
- CVE-2016-3413: Zimbra Collaboration integrity vulnerability via unknown vectorshighCVSS 7.5
- CVE-2016-3412: Zimbra Collaboration Multiple XSS VulnerabilitiesmediumCVSS 6.1
- CVE-2016-3411: Zimbra Collaboration XSS in changepass componentmediumCVSS 6.1
- CVE-2016-3410: Zimbra Collaboration multiple XSS vulnerabilitiesmediumCVSS 6.1
- CVE-2016-3409: Zimbra Collaboration XSS in unspecified componentsmediumCVSS 6.1
- CVE-2016-3408: Zimbra Collaboration XSS in unspecified componentmediumCVSS 6.1
- CVE-2016-3407: Zimbra Collaboration multiple XSS vulnerabilitiesmediumCVSS 6.1
- CVE-2016-3406: Zimbra Collaboration CSRF in Client uploader and REST handlershighCVSS 8.8
- CVE-2016-3405: Zimbra Collaboration multiple unspecified vulnerabilitieshighCVSS 7.5
- CVE-2016-3404: Zimbra Collaboration integrity vulnerability via unknown vectorshighCVSS 7.5
- CVE-2016-3402: Zimbra Collaboration unspecified confidentiality vulnerabilityhighCVSS 7.5
- CVE-2016-3401: Zimbra Collaboration integrity vulnerability via unknown vectorsmediumCVSS 6.5
Most severe Synacor Zimbra Collaboration Suite vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2020-7796: Synacor Zimbra Collaboration Suite SSRF in WebEx zimletcriticalexploited in the wildCVSS 9.8EPSS 92.7%
- CVE-2019-9670: Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Referencecriticalexploited in the wildCVSS 9.8
- CVE-2025-68645: Synacor Zimbra Collaboration Suite file inclusion in RestFilter servletcriticalexploited in the wildCVSS 8.8EPSS 47.7%
- CVE-2019-9621: Synacor Zimbra Collaboration Suite SSRF in ProxyServletcriticalexploited in the wildCVSS 7.5EPSS 94.1%
- CVE-2025-66376: Synacor Zimbra Collaboration Suite stored XSS in Classic UIcriticalexploited in the wildCVSS 7.2EPSS 10.9%
- CVE-2024-27443: Synacor Zimbra Collaboration Suite XSS in CalendarInvitecriticalexploited in the wildCVSS 6.1EPSS 32.4%
- CVE-2025-48700: Synacor Zimbra Collaboration Suite XSS in Classic UIcriticalexploited in the wildCVSS 6.1EPSS 18.8%
- CVE-2025-27915: Synacor Zimbra Collaboration Suite XSS in Classic Web Clientcriticalexploited in the wildCVSS 5.4EPSS 26.1%
- CVE-2016-3415: Zimbra Collaboration deserialization attack via unspecified vectorscriticalCVSS 9.1
- CVE-2016-3406: Zimbra Collaboration CSRF in Client uploader and REST handlershighCVSS 8.8
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/zimbra-collaboration-suite.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Synacor Zimbra Collaboration Suite vulnerabilities", https://junglewise.ai/threats/technologies/zimbra-collaboration-suite, 26 September 2026.