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Vulnerability record · CVE-2005-2540 · published 10 August 2005

CVE-2005-2540: Flatnuke vulnerability

Flatnuke · Flatnuke

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.

5.0 CVSS 2.0 Medium EPSS 6.1% · top 6.8%
5.0CVSS 2.0 base score
6.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=112327238030127&w=2
http://secunia.com/advisories/16330
http://www.osvdb.org/18554
http://www.rgod.altervista.org/flatnuke.html Exploit
http://www.securityfocus.com/bid/14485
https://exchange.xforce.ibmcloud.com/vulnerabilities/21709
http://marc.info/?l=bugtraq&m=112327238030127&w=2
http://secunia.com/advisories/16330
http://www.osvdb.org/18554
http://www.rgod.altervista.org/flatnuke.html Exploit
http://www.securityfocus.com/bid/14485
https://exchange.xforce.ibmcloud.com/vulnerabilities/21709

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2005-4448Flatnuke vulnerabilityFlatNuke 2.5.6 verifies authentication credentials based on an MD5 checksum of the admin name and the hashed password rather than the plaintext passw…EPSS 2.8%7.5CVE-2005-1894Flatnuke code injection vulnerabilityDirect code injection vulnerability in FlatNuke 2.5.3 allows remote attackers to execute arbitrary PHP code by placing the code into the Referer head…EPSS 3.7%7.5CVE-2005-0267Flatnuke vulnerabilityindex.php in FlatNuke 2.5.1 allows remote attackers to create an administrator account via carriage returns and #10 in the url_avatar field, which is…EPSS 1.7%7.5CVE-2005-0268Flatnuke vulnerabilityDirect code injection vulnerability in FlatNuke 2.5.1 allows remote attackers to execute arbitrary PHP code by placing the code into the url_avatar f…EPSS 1.5%6.4CVE-2005-2815Flatnuke vulnerabilityprint.php in FlatNuke 2.5.6 allows remote attackers to obtain sensitive information (path disclosure on error) or cause a denial of service (resource…EPSS 1.8%6.4CVE-2005-1892Flatnuke vulnerabilityFlatNuke 2.5.3 allows remote attackers to cause a denial of service or obtain sensitive information via (1) a direct request to foot_news.php, which …EPSS 2.2%5.0CVE-2005-4208Flatnuke vulnerabilityDirectory traversal vulnerability in Flatnuke 2.5.6 allows remote attackers to access arbitrary files via a .. (dot dot) and null byte (%00) in the i…EPSS 8.1%5.0CVE-2005-2813Flatnuke vulnerabilityDirectory traversal vulnerability in FlatNuke 2.5.6 and possibly earlier allows remote attackers to read arbitrary files via ".." sequences and "%00"…EPSS 6.9%

Source: NIST National Vulnerability Database (record CVE-2005-2540), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.