CVE-2004-1996

Simple Machines Forum 1.0 - Cross-Site Scripting via Size Tag

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2004-1996. PoCs published by Cheng Peng Su.

AI-analyzed exploit summary This is a writeup describing an HTML injection vulnerability in Simple Machines Forum (SMF) that allows arbitrary script execution via the font size attribute. The exploit leverages the 'expression' CSS function to bypass input filtering and steal cookies.

Description

Cross-site scripting (XSS) vulnerability in Simple Machines Forum (SMF) 1.0 allows remote attackers to inject arbitrary web script via the size tag.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Cheng Peng Su · textwebappsphp
https://www.exploit-db.com/exploits/24082

This is a writeup describing an HTML injection vulnerability in Simple Machines Forum (SMF) that allows arbitrary script execution via the font size attribute. The exploit leverages the 'expression' CSS function to bypass input filtering and steal cookies.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Simple Machines Forum (SMF)
No auth needed
Prerequisites: Access to post content on the forum · Victim interaction to view the malicious post
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=108377364615934&w=2
Exploit, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/10281
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/16067

Scores

EPSS 0.0173
EPSS Percentile 74.7%

Details

Status published
Products (3)
simple_machines/smf 1.0_beta4.1
simple_machines/smf 1.0_beta4p
simple_machines/smf 1.0_beta5p
Published May 05, 2004
Tracked Since Feb 18, 2026