How severe is CVE-2020-14066?

CVE-2020-14066 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-14066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-14066?

CVE-2020-14066 affects Icewarp Mail Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-14066?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-14066 published?

CVE-2020-14066 was published on 2020-07-15 and last updated on 2026-06-17.

CVE-2020-14066

CVE-2020-14066 is a high-severity vulnerability in Icewarp Mail Server with a CVSS 3.x base score of 8.8. 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Icewarp Mail Server
Published: 2020-07-15
Last modified: 2026-06-17

Description

IceWarp Email Server 12.3.0.1 allows remote attackers to upload JavaScript files that are dangerous for clients to access.

Frequently asked questions

What is CVE-2020-14066?: IceWarp Email Server 12.3.0.1 allows remote attackers to upload JavaScript files that are dangerous for clients to access.
How severe is CVE-2020-14066?: CVE-2020-14066 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-14066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-14066?: CVE-2020-14066 affects Icewarp Mail Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-14066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-14066 published?: CVE-2020-14066 was published on 2020-07-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:icewarp:mail_server:12.3.0.1:*:*:*:*:*:*:*

More vulnerabilities in Icewarp Mail Server

CVE-2023-39699 — Critical (CVSS 9.8): IceWarp Mail Server v10.4.5 was discovered to contain a local file inclusion (LFI) vulnerability via the component…
CVE-2019-12593 — High (CVSS 7.5): IceWarp Mail Server through 10.4.4 is prone to a local file inclusion vulnerability via…
CVE-2015-1503 — High (CVSS 7.5): Multiple directory traversal vulnerabilities in IceWarp Mail Server before 11.2 allow remote attackers to read…
CVE-2020-14065 — Medium (CVSS 6.5): IceWarp Email Server 12.3.0.1 allows remote attackers to upload files and consume disk space.
CVE-2020-14064 — Medium (CVSS 6.5): IceWarp Email Server 12.3.0.1 has Incorrect Access Control for user accounts.
CVE-2011-3579 — Medium (CVSS 6.4): server/webmail.php in IceWarp WebMail in IceWarp Mail Server before 10.3.3 allows remote attackers to read arbitrary…

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