CVE-2026-103589 in QloApps
Summary
by MITRE • 10/01/2026
QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor that fails to escape room_num, 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.
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Analysis
by VulDB Data Team • 10/01/2026
The QloApps content management system, specifically through version 1.7.0, suffers from a reflected cross-site scripting vulnerability located within its administrative interface. This security flaw is situated in the back-office room type editor module, which is designed to manage configuration details for hotel or accommodation rooms. The core technical deficiency lies in the application's failure to properly sanitize and encode user-supplied input before rendering it into HTML attributes. Specifically, the fields designated for room numbers, floor identifiers, and descriptive comments are processed without adequate escaping mechanisms. When these values are subsequently displayed back to the administrator during editing operations or error states, the malicious script content is injected directly into the DOM structure of the page rather than being treated as inert text data.
This vulnerability allows authenticated administrators who access the compromised module to be targeted by attackers via social engineering tactics such as phishing. An attacker can construct a specially crafted POST request containing JavaScript payloads within the room_num, floor, or comment fields and induce an administrator to submit it through the legitimate interface. Upon processing this input, the application reflects the malicious content back into the response without validation. When the browser renders this page for the victim, the embedded script executes in the context of the administrative session. This execution environment grants the attacker significant privileges equivalent to those held by the compromised user account, bypassing standard security controls that rely on authentication boundaries.
The operational impact of this vulnerability is severe due to the high privilege level associated with back-office access. Successful exploitation enables an adversary to perform actions such as stealing sensitive administrative cookies or session tokens, which can lead to full account takeover and persistent unauthorized access even after the initial script execution concludes. Furthermore, attackers can manipulate the user interface to trick administrators into performing unintended actions, a technique known as cross-site request forgery facilitated by XSS. This may include modifying critical configuration settings, exfiltrating customer data stored within the platform, or defacing the administrative dashboard. The ability to execute arbitrary JavaScript effectively neutralizes the confidentiality and integrity guarantees provided by the application's authentication layer.
From a classification perspective, this issue aligns with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. More specifically, it represents a reflected variant where the malicious payload is immediately returned to the user without being stored in a database or persistent storage medium. In terms of offensive security frameworks, this vulnerability facilitates techniques categorized under MITRE ATT&CK T1059, which covers Command and Scripting Interpreter execution via browser-based vectors. It also relates to T1534 regarding Internal Spearphishing if the attack vector relies on deceiving an internal user into triggering the payload through a manipulated link or form submission within the trusted application context.
Mitigation strategies for this vulnerability require both immediate remediation and long-term architectural improvements. The most effective technical fix involves implementing strict output encoding for all dynamic content rendered in HTML attributes, ensuring that special characters such as angle brackets, quotes, and ampersands are converted to their corresponding HTML entities before being inserted into the DOM. Developers should also adopt input validation practices that reject or sanitize unexpected character sets in fields expecting numeric or alphanumeric data only. Additionally, implementing Content Security Policy headers can provide a layer of defense-in-depth by restricting the sources from which scripts are allowed to execute, thereby mitigating the impact even if an injection occurs. Upgrading to patched versions released after 1.7.0 is essential for resolving this issue at its source within the QloApps codebase.