How severe is CVE-2017-18403?

CVE-2017-18403 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2017-18403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18403?

CVE-2017-18403 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18403?

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

When was CVE-2017-18403 published?

CVE-2017-18403 was published on 2019-08-02 and last updated on 2026-06-17.

CVE-2017-18403

CVE-2017-18403 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 6.3. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Cpanel
Published: 2019-08-02
Last modified: 2026-06-17

Description

cPanel before 68.0.15 allows code execution in the context of the nobody account via Mailman archives (SEC-337).

Frequently asked questions

What is CVE-2017-18403?: cPanel before 68.0.15 allows code execution in the context of the nobody account via Mailman archives (SEC-337).
How severe is CVE-2017-18403?: CVE-2017-18403 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2017-18403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18403?: CVE-2017-18403 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-18403 published?: CVE-2017-18403 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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