How severe is CVE-2020-35769?

CVE-2020-35769 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-2020-35769 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35769?

CVE-2020-35769 affects Webmin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35769?

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-2020-35769 published?

CVE-2020-35769 was published on 2020-12-29 and last updated on 2026-06-17.

CVE-2020-35769

CVE-2020-35769 is a critical-severity vulnerability in Webmin 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% (75th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Webmin
Published: 2020-12-29
Last modified: 2026-06-17

Description

miniserv.pl in Webmin 1.962 on Windows mishandles special characters in query arguments to the CGI program.

Frequently asked questions

What is CVE-2020-35769?: miniserv.pl in Webmin 1.962 on Windows mishandles special characters in query arguments to the CGI program.
How severe is CVE-2020-35769?: CVE-2020-35769 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-2020-35769 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35769?: CVE-2020-35769 affects Webmin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35769?: 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-2020-35769 published?: CVE-2020-35769 was published on 2020-12-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webmin:webmin:1.962:*:*:*:*:*:*:*

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