How severe is CVE-2019-8945?

CVE-2019-8945 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-8945 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8945?

CVE-2019-8945 primarily affects Zimbra Collaboration Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-8945?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-8945 published?

CVE-2019-8945 was published on 2020-01-27 and last updated on 2026-06-17.

CVE-2019-8945

CVE-2019-8945 is a medium-severity vulnerability in Zimbra Collaboration Server with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zimbra Collaboration Server
Published: 2020-01-27
Last modified: 2026-06-17

Description

Zimbra Collaboration 8.7.x - 8.8.11P2 contains persistent XSS.

Frequently asked questions

What is CVE-2019-8945?: Zimbra Collaboration 8.7.x - 8.8.11P2 contains persistent XSS.
How severe is CVE-2019-8945?: CVE-2019-8945 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-8945 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8945?: CVE-2019-8945 primarily affects Zimbra Collaboration Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-8945?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-8945 published?: CVE-2019-8945 was published on 2020-01-27 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:zimbra:collaboration_server:*:*:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration_server:8.8.11:p1:*:*:*:*:*:*
cpe:2.3:a:zimbra:collaboration_server:8.8.11:p2:*:*:*:*:*:*

More vulnerabilities in Zimbra Collaboration Server

CVE-2013-7217 — Critical (CVSS 10.0): Unspecified vulnerability in Zimbra Collaboration Server 7.2.5 and earlier, and 8.0.x through 8.0.5, has "critical"…
CVE-2019-8947 — Medium (CVSS 6.1): Zimbra Collaboration 8.7.x - 8.8.11P2 contains non-persistent XSS.
CVE-2019-8946 — Medium (CVSS 6.1): Zimbra Collaboration 8.7.x - 8.8.11P2 contains persistent XSS.
CVE-2019-15313 — Medium (CVSS 6.1): In Zimbra Collaboration before 8.8.15 Patch 1, there is a non-persistent XSS vulnerability.
CVE-2019-12427 — Medium (CVSS 4.8): Zimbra Collaboration before 8.8.15 Patch 1 is vulnerable to a non-persistent XSS via the Admin Console.

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