How severe is CVE-2020-29135?

CVE-2020-29135 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2020-29135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29135?

CVE-2020-29135 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29135?

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

When was CVE-2020-29135 published?

CVE-2020-29135 was published on 2020-11-27 and last updated on 2026-06-17.

CVE-2020-29135

CVE-2020-29135 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 4.1. 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-838.

Key facts

Severity: Medium (CVSS 3.x base score 4.1)
CVSS v2: 3.5
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-838
Affected product: Cpanel
Published: 2020-11-27
Last modified: 2026-06-17

Description

cPanel before 90.0.17 has multiple instances of URL parameter injection (SEC-567).

Frequently asked questions

What is CVE-2020-29135?: cPanel before 90.0.17 has multiple instances of URL parameter injection (SEC-567).
How severe is CVE-2020-29135?: CVE-2020-29135 has a CVSS 3.x base score of 4.1, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2020-29135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29135?: CVE-2020-29135 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29135?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-29135 published?: CVE-2020-29135 was published on 2020-11-27 and last updated on 2026-06-17.

References

Affected products (1)

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

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