CVE-2026-90528 in tduck-platform
Summary
by MITRE • 09/13/2026
A flaw has been found in TDuckApp tduck-platform up to 5.3. Affected by this vulnerability is an unknown functionality of the file tduck-front/src/views/form/write/index.vue of the component Form Write View. This manipulation of the argument submitShowCustomPageContent causes cross site scripting. The attack is possible to be carried out remotely. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 09/13/2026
The vulnerability identified in TDuckApp tduck-platform, specifically within versions up to 5.3, represents a significant security risk stemming from improper input validation and output encoding mechanisms within the Form Write View component. The flaw is located in the file path tduck-front/src/views/form/write/index.vue, which serves as the frontend interface for form submission workflows. This component handles user-generated content that is subsequently rendered on the page without adequate sanitization of specific arguments passed to it. The core technical deficiency lies in how the application processes the submitShowCustomPageContent argument. When this parameter receives input containing malicious script payloads, the application fails to escape special characters or validate the data against a strict allowlist before injecting it into the Document Object Model. This lack of proper encoding allows an attacker to inject executable JavaScript code that executes within the context of the victim's browser session whenever the vulnerable functionality is triggered through normal user interaction with the form interface.
This vulnerability is classified as Cross-Site Scripting, commonly referred to by its acronym XSS, and maps directly to CWE-79 in the Common Weakness Enumeration taxonomy. Specifically, it falls under the category of Improper Neutralization of Input During Web Page Generation. The operational impact of this flaw is severe because it enables remote code execution within the client-side environment. An attacker can craft a malicious URL or manipulate form submission data to deliver script payloads that run automatically when a user views the affected page. Once executed, these scripts have access to all cookies, session tokens, and local storage associated with the TDuckApp domain due to same-origin policy constraints. This capability allows for account hijacking, where an attacker can steal authentication credentials or session identifiers to impersonate legitimate users. Furthermore, it facilitates phishing attacks by allowing the injection of fraudulent login forms that capture sensitive user information such as passwords or personal identification details. The persistence of this vulnerability is exacerbated by the fact that the project maintainers have not yet issued a patch despite being notified through an issue report, leaving deployed instances exposed to exploitation indefinitely.
From a threat intelligence perspective, this vulnerability aligns with several techniques in the MITRE ATT&CK framework for both web applications and mobile platforms. The initial access vector corresponds to T1189 Drive-by Client Side Scripting, where attackers rely on users visiting compromised or manipulated legitimate websites to execute malicious code without direct interaction beyond viewing the page. If the attacker successfully steals session cookies, this transitions into T1530 Data from Local System, involving the exfiltration of sensitive data stored locally by the browser. Additionally, if the injected scripts modify the DOM to redirect users to phishing sites or display deceptive content, it relates to T1498 Network Denial of Service via client-side manipulation or potentially T1621 Multi-Stage Requests for more complex attack chains involving multiple domains. The remote nature of this exploit means that no prior authentication is necessarily required if the vulnerable form page is publicly accessible, significantly lowering the barrier to entry for opportunistic attackers scanning for unpatched instances of TDuckApp.
Mitigation strategies must focus on immediate remediation and defensive coding practices until an official patch is released by the vendor. Developers should implement strict input validation on all user-supplied data before it is processed or stored, ensuring that only expected character sets are accepted. More critically, output encoding must be applied consistently whenever dynamic content is rendered into HTML elements. This involves escaping special characters such as ampersands, less-than and greater-than signs, quotes, and apostrophes to prevent them from being interpreted as executable code by the browser. Implementing a Content Security Policy header can also provide an additional layer of defense by restricting the sources from which scripts are allowed to load or execute, thereby mitigating the impact of any successfully injected payloads. Organizations currently running TDuckApp versions prior to 5.3 should monitor official channels for updates and consider isolating affected instances behind web application firewalls that can detect and block common XSS patterns in HTTP requests as a temporary countermeasure until the underlying code is corrected by the maintainers.