CVE-2019-12840
HighPublic exploitIn 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.
Published Jun 15, 2019 · Updated Aug 7, 2026
Key Facts
Patch immediately- CVE-2019-12840 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Webmin.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 77% probability of exploitation in the next 30 days.
- Fixed versions are available, including Webmin <=1.910, Webmin 1.910.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.8
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
77%
Higher than 99.5% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-12840 brief as a PDF
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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.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebminWebmin | See advisory | 1.910 |
Patched Releases
Webmin
<=1.910
Timeline
Publicly disclosed
Jun 15, 2019
Last updated
Aug 7, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
FAQ
Common Questions.
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.
Affected: Webmin. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Webmin <=1.910, Webmin 1.910.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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