How severe is CVE-2019-20490?

CVE-2019-20490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-20490 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20490?

CVE-2019-20490 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20490?

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-2019-20490 published?

CVE-2019-20490 was published on 2020-03-17 and last updated on 2026-06-17.

CVE-2019-20490

CVE-2019-20490 is a high-severity vulnerability in Cpanel with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cpanel
Published: 2020-03-17
Last modified: 2026-06-17

Description

cPanel before 82.0.18 allows authentication bypass because webmail usernames are processed inconsistently (SEC-499).

Frequently asked questions

What is CVE-2019-20490?: cPanel before 82.0.18 allows authentication bypass because webmail usernames are processed inconsistently (SEC-499).
How severe is CVE-2019-20490?: CVE-2019-20490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-20490 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20490?: CVE-2019-20490 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20490?: 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-2019-20490 published?: CVE-2019-20490 was published on 2020-03-17 and last updated on 2026-06-17.

References

https://documentation.cpanel.net/display/CL/82+Change+Log

Affected products (1)

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

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