How severe is CVE-2018-20949?

CVE-2018-20949 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-20949 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20949?

CVE-2018-20949 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20949?

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

When was CVE-2018-20949 published?

CVE-2018-20949 was published on 2019-08-01 and last updated on 2026-06-17.

CVE-2018-20949

CVE-2018-20949 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cpanel
Published: 2019-08-01
Last modified: 2026-06-17

Description

cPanel before 68.0.27 allows self XSS in WHM Apache Configuration Include Editor (SEC-385).

Frequently asked questions

What is CVE-2018-20949?: cPanel before 68.0.27 allows self XSS in WHM Apache Configuration Include Editor (SEC-385).
How severe is CVE-2018-20949?: CVE-2018-20949 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-20949 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20949?: CVE-2018-20949 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20949?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20949 published?: CVE-2018-20949 was published on 2019-08-01 and last updated on 2026-06-17.

References

Affected products (1)

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

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