FlatNuke 2.5.5 username].php registration cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in FlatNuke 2.5.5. This impacts the function registration of the file username].php. The manipulation results in cross site scripting. This vulnerability is known as CVE-2005-2540. It is possible to launch the attack remotely. Furthermore, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in FlatNuke 2.5.5 (Content Management System). It has been classified as problematic. Affected is the function registration of the file username].php. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity. CVE summarizes:

CRLF injection vulnerability in FlatNuke 2.5.5 and possibly earlier versions allows remote attackers to execute arbitrary PHP commands via an ASCII char 13 (carriage return) in the signature field, which is injected into a PHP script without a preceding comment character, which can then be executed by a direct request.

The bug was discovered 08/05/2005. The weakness was published 08/04/2005 by rgod (Website). The advisory is shared for download at rgod.altervista.org. This vulnerability is traded as CVE-2005-2540 since 08/10/2005. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

After before and not just, there has been an exploit disclosed. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:username].php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 19396 (FlatNuke < 2.5.6 Multiple Remote Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (21709), Exploit-DB (1140), Tenable (19396), SecurityFocus (BID 14485†) and OSVDB (18554†). Similar entries are available at VDB-27451, VDB-25979, VDB-25978 and VDB-25977. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-80 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 19396
Nessus Name: FlatNuke < 2.5.6 Multiple Remote Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/04/2005 🔍
08/04/2005 +0 days 🔍
08/05/2005 +0 days 🔍
08/05/2005 +0 days 🔍
08/05/2005 +0 days 🔍
08/08/2005 +2 days 🔍
08/08/2005 +0 days 🔍
08/10/2005 +2 days 🔍
08/10/2005 +0 days 🔍
09/05/2005 +26 days 🔍
03/11/2015 +3474 days 🔍
07/06/2025 +3769 days 🔍

Sourcesinfo

Advisory: rgod.altervista.org
Researcher: rgod
Status: Confirmed

CVE: CVE-2005-2540 (🔍)
GCVE (CVE): GCVE-0-2005-2540
GCVE (VulDB): GCVE-100-25980
X-Force: 21709
SecurityFocus: 14485 - FlatNuke User Data Arbitrary PHP Code Execution Vulnerability
Secunia: 16330
OSVDB: 18554 - FlatNuke User Signature Arbitrary Command Execution
Vulnerability Center: 9049 - FlatNuke Content Management CRLF Injection via ASCII Char 13 in Signature Field, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/11/2015 23:39
Updated: 07/06/2025 00:50
Changes: 03/11/2015 23:39 (75), 06/08/2019 17:47 (3), 07/06/2025 00:50 (18)
Complete: 🔍
Cache ID: 216:F94:103

Once again VulDB remains the best source for vulnerability data.

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