CVE-2026-0521 in MAP+
Summary
by MITRE • 02/06/2026
A reflected cross-site scripting (XSS) vulnerability in the PDF export functionality of the TYDAC AG MAP+ solution allows unauthenticated attackers to craft a malicious URL, that if visited by a victim, will execute arbitrary JavaScript in the victim's context. Such a URL could be delivered through various means, for instance, by sending a link or by tricking victims to visit a page crafted by the attacker.
This issue was verified in MAP+: 3.4.0.
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Analysis
by VulDB Data Team • 02/19/2026
The CVE-2026-0521 vulnerability represents a critical reflected cross-site scripting flaw within the TYDAC AG MAP+ solution's PDF export functionality. This vulnerability specifically affects version 3.4.0 of the software and exposes users to significant security risks through the exploitation of web application input validation weaknesses. The flaw resides in how the application processes user-supplied data during PDF generation requests, creating an avenue for malicious actors to inject and execute arbitrary JavaScript code within the victim's browser context. The vulnerability's severity is amplified by its unauthenticated nature, meaning attackers can exploit it without requiring valid credentials or privileged access to the system.
The technical implementation of this XSS vulnerability stems from insufficient input sanitization and output encoding within the PDF export module. When users request PDF generation, the application accepts parameters from the HTTP request and incorporates them directly into the generated PDF content without proper validation or sanitization. This creates a reflected XSS vector where attacker-controlled data flows from the request to the response, executing malicious scripts in the victim's browser. The vulnerability operates through the standard reflected XSS attack pattern where malicious input is reflected back to the user in the application's response, bypassing the application's security controls. This behavior aligns with CWE-79 which defines cross-site scripting vulnerabilities as weaknesses that occur when an application includes untrusted data in dynamically generated web pages without proper validation or encoding.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling attackers to perform session hijacking, credential theft, and data exfiltration from authenticated users. An attacker could craft malicious URLs that, when clicked by a victim, would execute scripts capable of stealing session cookies, capturing keystrokes, or redirecting users to malicious sites. The reflected nature of the vulnerability means that the attack payload must be embedded in a URL and delivered to the victim through social engineering techniques such as phishing emails, malicious websites, or compromised social media platforms. This delivery mechanism makes the vulnerability particularly dangerous as it can be propagated through multiple channels and may be difficult to detect by traditional security measures that focus on network-level threats rather than application-level vulnerabilities.
The exploitation of this vulnerability requires minimal prerequisites, making it an attractive target for attackers seeking to compromise user sessions or extract sensitive information from the MAP+ environment. The vulnerability's presence in the PDF export functionality suggests that it may affect various types of user interactions including document generation, report creation, and data export operations. Organizations using TYDAC AG MAP+ version 3.4.0 should consider this vulnerability as a high-priority security concern, particularly in environments where users have access to sensitive data or where session management is critical. The vulnerability's impact is compounded by the fact that it affects the core functionality of the application, meaning that legitimate users may inadvertently trigger the vulnerability through normal application usage patterns.
Mitigation strategies for CVE-2026-0521 should focus on implementing proper input validation and output encoding mechanisms within the PDF export functionality. Organizations should ensure that all user-supplied data is sanitized before being incorporated into the PDF generation process, using established security libraries and frameworks that provide robust XSS protection. The implementation of Content Security Policy headers can provide additional defense-in-depth measures by restricting the sources from which scripts can be loaded and executed within the application's context. Regular security testing and code reviews should be conducted to identify and remediate similar vulnerabilities in other application modules. Additionally, users should be educated about the risks of clicking suspicious links and the importance of verifying the authenticity of URLs before visiting them, particularly when dealing with sensitive applications like MAP+. This vulnerability demonstrates the importance of maintaining up-to-date security practices and the need for comprehensive security testing throughout the software development lifecycle, aligning with ATT&CK technique T1059.007 for scripting and T1566 for social engineering attacks that leverage reflected XSS vulnerabilities.