VulnerabilityModified

CVE-2003-1131

PHP remote file inclusion vulnerability in index.php in KnowledgeBuilder, referred to as KnowledgeBase, allows remote attackers to execute arbitrary PHP code by modifying the page parameter to reference a URL on a remote web server that contains the code.

EXPLOIT ✓HIGH 7.5EPSS 3.43%

Does this matter?

A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 3.4%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.

Description

CVSS 2.0: 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS: 3.43% probability · 89th percentile
Public exploits: 1 in Exploit-DB · verified · first 24 December 2003
CISA KEV: Not listed
Affected: activecampaign/knowledgebuilder
Source: cve@mitre.org

EPSS trend

EPSS 3.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-ID	Title	Type	Published	Verified
EDB-23476 source ↗	KnowledgeBuilder 2.0/2.1/3.0 - Remote File Inclusionphp · Zero X	webapps	24 December 2003	yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.