How severe is CVE-2019-12840?

CVE-2019-12840 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-2019-12840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 78% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12840?

CVE-2019-12840 affects Webmin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12840?

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-2019-12840 published?

CVE-2019-12840 was published on 2019-06-15 and last updated on 2026-06-17.

CVE-2019-12840

CVE-2019-12840 is a high-severity vulnerability in Webmin with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 78% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 78% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Webmin
Published: 2019-06-15
Last modified: 2026-06-17

Description

In Webmin through 1.910, any user authorized to the "Package Updates" module can execute arbitrary commands with root privileges via the data parameter to update.cgi.

Frequently asked questions

What is CVE-2019-12840?: In Webmin through 1.910, any user authorized to the "Package Updates" module can execute arbitrary commands with root privileges via the data parameter to update.cgi.
How severe is CVE-2019-12840?: CVE-2019-12840 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-2019-12840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 78% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12840?: CVE-2019-12840 affects Webmin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12840?: 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-2019-12840 published?: CVE-2019-12840 was published on 2019-06-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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