QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor's length of stay fields. Attackers can induce authenticated administrators to submit crafted POST requests with malicious payloads in restrictionminlos and restrictionmaxlos parameters, executing arbitrary JavaScript in the victim's administrative session.

QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor that fails to escape roomnum, floor, and comment field values in input attributes. Attackers can induce authenticated back-office users to submit crafted POST requests with malicious payloads to execute arbitrary JavaScript in the victim's administrative session.

QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the exceptions field of the back-office Transplant a module form. Attackers can craft a malicious link containing JavaScript payload in the exceptions parameter that executes in an authenticated administrator's session when the victim follows the link.

QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office Hotel Reservation System Book Now search, where dateto and idroomtype parameters are copied into template variables without validation. Attackers can craft a malicious link containing JavaScript payload in these parameters that executes in an authenticated administrator's session when the victim follows the link.

QloApps through 1.7.0 contains a stored cross-site scripting vulnerability in the admin file manager that allows authenticated administrators to inject malicious JavaScript by uploading crafted SVG files. Attackers can embed JavaScript event handlers such as onload within SVG files uploaded through the file manager to execute arbitrary scripts in the browser of any user who subsequently views the file.

QloApps through 1.7.0, fixed in commit 64e9722, contains a weak cryptographic algorithm vulnerability that allows attackers to compromise user credentials by exploiting the use of MD5 for password hashing in the Tools::encrypt() function within classes/Tools.php, which concatenates a static cookie key with the supplied password. Attackers can perform offline brute-force attacks against the MD5 hashes, with the risk compounded by auto-generated 8-character passwords assigned during guest-to-customer account conversion in classes/Customer.php, making credential recovery trivial.

A CSRF issue in index.php in QloApps hotel eCommerce 1.5.1 allows an attacker to change the admin's email address via a crafted HTML document.

Unrestricted file upload in the hotel review feature in QloApps versions 1.7.0 and earlier allows remote unauthenticated attackers to achieve remote code execution.