CVE-2021-46709: 
Linux Debian vulnerability analysis and mitigation

phpLiteAdmin through version 1.9.8.2 contains a Cross-Site Scripting (XSS) vulnerability that allows attackers to execute malicious scripts via the newRows parameter (also known as num or number) in index.php. The vulnerability was disclosed on March 13, 2022, and affects all versions of phpLiteAdmin up to and including version 1.9.8.2 (NVD, CVE).

The vulnerability exists due to improper input validation in index.php. On line 2667, the application directly assigns $_GET['newRows'] to a variable $number without proper sanitization, and then on line 2670, it echoes this variable directly within an input tag. An attacker can exploit this by injecting malicious JavaScript code through the newRows parameter. The vulnerability has been assigned a CVSS v3.1 Base Score of 6.1 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, indicating that it requires user interaction but can be exploited remotely without authentication (NVD).

If successfully exploited, this vulnerability allows attackers to perform cross-site scripting (XSS) attacks. An attacker could potentially inject malicious scripts that execute in the context of other users' browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions (Ubuntu Security).

The vulnerability has been addressed in subsequent updates. Ubuntu has released fixed versions: 1.9.8.2-1ubuntu0.20.04.1 for Ubuntu 20.04 LTS and 1.9.7.1-1ubuntu0.3 for Ubuntu 18.04 LTS. Users are advised to update their phpLiteAdmin installations to the latest patched version (Ubuntu Security).