How severe is CVE-2017-18437?

CVE-2017-18437 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-18437 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18437?

CVE-2017-18437 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18437?

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

When was CVE-2017-18437 published?

CVE-2017-18437 was published on 2019-08-02 and last updated on 2026-06-17.

CVE-2017-18437

CVE-2017-18437 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 4.4. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
CVSS v2: 3.6
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Cpanel
Published: 2019-08-02
Last modified: 2026-06-17

Description

cPanel before 64.0.21 allows a Webmail account to execute code via forwarders (SEC-240).

Frequently asked questions

What is CVE-2017-18437?: cPanel before 64.0.21 allows a Webmail account to execute code via forwarders (SEC-240).
How severe is CVE-2017-18437?: CVE-2017-18437 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-18437 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18437?: CVE-2017-18437 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18437?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-18437 published?: CVE-2017-18437 was published on 2019-08-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*

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