CVE-2005-4891Public exploitNetwork attack vector

Arbitrary SQL execution via crafted msg parameter

Published Jan 15, 2020 · Updated Aug 8, 2024

SQL injection in Simple Machines Forum 1.0.4 and earlier allows remote attackers to execute arbitrary SQL via the msg parameter. The index.php message handler incorporates the attacker-controlled msg value into a database query without neutralizing SQL syntax. No authentication or user interaction is required; successful requests can read or modify forum database contents and interrupt service.

CVSS severity9.8
Critical
EPSS probability1.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Simple Machines Forum 1.0.4 and earlier allows remote attackers to execute arbitrary SQL via the msg parameter. The index.php message handler incorporates the attacker-controlled msg value into a database query without neutralizing SQL syntax. No authentication or user interaction is required; successful requests can read or modify forum database contents and interrupt service.

The record

CVE
CVE-2005-4891
Published
Jan 15, 2020
Updated
Aug 8, 2024
Vendor
Simple Machines
Product
Simple Machines Forum
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1.0.4 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Simple Machines · Simple Machines Forumversion=1.0.4 and earlier

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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