CVE-2015-2079Public exploitNetwork attack vector

Authenticated command execution via signature file pipes

Published Apr 28, 2025 · Updated Apr 28, 2025

Code injection in Usermin 0.980 through 1.x before 1.660 allows remote authenticated users to execute shell commands via a signature path. The mailbox get_signature function passes the sig_file_free-derived path to Perl's two-argument open, so pipe delimiters turn the value into a shell command. Any regular Usermin account that can edit its mailbox signature can run commands with that Unix user's privileges, affecting confidentiality, integrity, and availability.

CVSS severity9.9
Critical
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Usermin 0.980 through 1.x before 1.660 allows remote authenticated users to execute shell commands via a signature path. The mailbox get_signature function passes the sig_file_free-derived path to Perl's two-argument open, so pipe delimiters turn the value into a shell command. Any regular Usermin account that can edit its mailbox signature can run commands with that Unix user's privileges, affecting confidentiality, integrity, and availability.

The record

CVE
CVE-2015-2079
Published
Apr 28, 2025
Updated
Apr 28, 2025
Vendor
Webmin
Product
Usermin
Classifications
CWE-96, CWE-94, T1059.004, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.980 <1.660

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Webmin · Userminversion=0.980 <1.660

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.9MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-96Improper Neutralization of Directives in Statically Saved Code ('Static Code Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.004Unix Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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