CVE-2023-28854Network attack vector

Authenticated command execution via unvalidated login address

Published Apr 3, 2023 · Updated Feb 11, 2025

OS command injection in paijp nophp before 0.0.1 allows remote authenticated users to execute commands through password-mail handling. The bq_login function substitutes the login value into sys->mailcmd and passes the resulting string to popen without rejecting shell metacharacters. Exploitation requires permission to add or change a login to an invalid mail address and another password-setting or mail-login action; commands run as the HTTP server user.

CVSS severity8.0
High
EPSS probability1.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in paijp nophp before 0.0.1 allows remote authenticated users to execute commands through password-mail handling. The bq_login function substitutes the login value into sys->mailcmd and passes the resulting string to popen without rejecting shell metacharacters. Exploitation requires permission to add or change a login to an invalid mail address and another password-setting or mail-login action; commands run as the HTTP server user.

The record

CVE
CVE-2023-28854
Published
Apr 3, 2023
Updated
Feb 11, 2025
Vendor
paijp
Product
nophp
Classifications
CWE-78, CWE-77, T1190, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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=< 0.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

paijp · nophpversion=< 0.0.1

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo