How severe is CVE-2017-18434?

CVE-2017-18434 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-18434 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18434?

CVE-2017-18434 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18434?

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-2017-18434 published?

CVE-2017-18434 was published on 2019-08-02 and last updated on 2026-06-17.

CVE-2017-18434

CVE-2017-18434 is a high-severity vulnerability in Cpanel with a CVSS 3.x base score of 7.8. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cpanel
Published: 2019-08-02
Last modified: 2026-06-17

Description

cPanel before 64.0.21 allows code execution in the context of the root account via a SET_VHOST_LANG_PACKAGE multilang adminbin call (SEC-237).

Frequently asked questions

What is CVE-2017-18434?: cPanel before 64.0.21 allows code execution in the context of the root account via a SET_VHOST_LANG_PACKAGE multilang adminbin call (SEC-237).
How severe is CVE-2017-18434?: CVE-2017-18434 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-18434 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18434?: CVE-2017-18434 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18434?: 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-2017-18434 published?: CVE-2017-18434 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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