Cross-site scripting (XSS) vulnerability in FlatNuke 2.5.6 allows remote attackers to inject arbitrary web script or HTML via the usr parameter in a vis_reg operation to index.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22101
Source: Mitre, NVD
Published: 2005-09-07
Updated: 2026-06-16
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.02596