Zimbra Collaboration Suite (ZCS)
Summary iPlain-English security verdict for Zimbra Collaboration Suite (ZCS), generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Zimbra Collaboration Suite (ZCS) currently scores 0/100 — critical, with active exploitation. 17 of its known vulnerabilities are being actively exploited in the wild (CISA KEV), including CVE-2019-9670. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
Disclosure trend iNew CVEs published for Zimbra Collaboration Suite (ZCS) each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
5 of its known vulnerabilities are linked to ransomware campaigns (CISA KEV).
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
Most urgent first — actively exploited, then likeliest to be exploited.
CVE-2019-9670 CRITICAL exploited XML external entity (XXE) EPSS 100% → fixed in 8.7.11 CVE-2024-45519 CRITICAL exploited OS command injection EPSS 100% → fixed in 10.0.9 CVE-2022-27925 HIGH exploited ransomware Path traversal EPSS 98% → see advisory CVE-2022-41352 CRITICAL exploited Path traversal EPSS 95% → see advisory CVE-2022-37042 CRITICAL exploited ransomware Path traversal EPSS 88% → see advisory CVE-2020-7796 CRITICAL exploited Server-side request forgery (SSRF) EPSS 85% → fixed in 8.8.15 CVE-2022-27924 HIGH exploited ransomware Injection EPSS 85% → see advisory CVE-2019-9621 HIGH exploited Server-side request forgery (SSRF) EPSS 81% → fixed in 8.8.9 CVE-2023-34192 CRITICAL exploited Cross-site scripting (XSS) EPSS 77% → see advisory CVE-2023-37580 MEDIUM exploited Cross-site scripting (XSS) EPSS 59% → fixed in 8.8.15 CVE-2025-68645 HIGH exploited CWE-98 EPSS 32% → fixed in 10.1.13 CVE-2022-24682 MEDIUM exploited ransomware CWE-116 EPSS 31% → fixed in 8.8.15See all 82 known Zimbra Collaboration Suite (ZCS) CVEs & security history →
How to patch Zimbra Collaboration Suite (ZCS) — step-by-step to the latest secure version →
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Frequently asked
Is Zimbra Collaboration Suite (ZCS) safe and patched?
Zimbra Collaboration Suite (ZCS) currently scores 0/100 — critical, with active exploitation. 17 of its known vulnerabilities are being actively exploited in the wild (CISA KEV), including CVE-2019-9670. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
What should I do about Zimbra Collaboration Suite (ZCS) now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Synacor's official advisory. Some issues are under active exploitation, so treat this as urgent.
Why is Zimbra Collaboration Suite (ZCS) listed on IsItPatched?
Zimbra Collaboration Suite (ZCS) was added automatically because CISA's Known Exploited Vulnerabilities (KEV) catalog flagged it as actively exploited in the wild. IsItPatched tracks its known CVEs, severity (CVSS), exploitation probability (EPSS) and KEV status from public data; its version and lifecycle mapping is verified over time.
lifecycle unknown — needs latest supported version
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Synacor's official advisory before you patch or upgrade.