How severe is CVE-2020-10121?

CVE-2020-10121 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-10121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10121?

CVE-2020-10121 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-10121 published?

CVE-2020-10121 was published on 2020-03-17 and last updated on 2026-06-17.

CVE-2020-10121

CVE-2020-10121 is a critical-severity vulnerability in Cpanel with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cpanel
Published: 2020-03-17
Last modified: 2026-06-17

Description

cPanel before 84.0.20 allows a demo account to achieve code execution via PassengerApps APIs (SEC-546).

Frequently asked questions

What is CVE-2020-10121?: cPanel before 84.0.20 allows a demo account to achieve code execution via PassengerApps APIs (SEC-546).
How severe is CVE-2020-10121?: CVE-2020-10121 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-10121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10121?: CVE-2020-10121 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-10121 published?: CVE-2020-10121 was published on 2020-03-17 and last updated on 2026-06-17.

References

https://documentation.cpanel.net/display/CL/84+Change+Log

Affected products (1)

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

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