How severe is CVE-2018-20947?

CVE-2018-20947 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-20947 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20947?

CVE-2018-20947 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20947?

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

When was CVE-2018-20947 published?

CVE-2018-20947 was published on 2019-08-01 and last updated on 2026-06-17.

CVE-2018-20947

CVE-2018-20947 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 5.5. 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-668.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Cpanel
Published: 2019-08-01
Last modified: 2026-06-17

Description

cPanel before 68.0.27 allows certain file-write operations via the telnetcrt script (SEC-356).

Frequently asked questions

What is CVE-2018-20947?: cPanel before 68.0.27 allows certain file-write operations via the telnetcrt script (SEC-356).
How severe is CVE-2018-20947?: CVE-2018-20947 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-20947 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20947?: CVE-2018-20947 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20947?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20947 published?: CVE-2018-20947 was published on 2019-08-01 and last updated on 2026-06-17.

References

https://documentation.cpanel.net/display/CL/68+Change+Log

Affected products (1)

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

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