CVE-2025-41087 identifies a stored Cross-Site Scripting (XSS) vulnerability in Taclia's web application that affects all versions of the product. The vulnerability stems from improper neutralization of input during web page generation (CWE-79), specifically in the handling of uploaded SVG images. SVG files can contain embedded scripts, and Taclia's application fails to sanitize these uploads adequately, allowing attackers to embed malicious JavaScript code within SVG images such as user profile pictures. When these images are stored on the server and later rendered in the context of a user's browser, the embedded scripts execute with the privileges of the web application. This can lead to a range of attacks including session hijacking, credential theft, unauthorized actions on behalf of the user, and potential pivoting within the affected network. The CVSS 4.0 vector indicates the attack can be performed remotely over the network (AV:N) with low attack complexity (AC:L), does not require authentication (AT:N), but does require user interaction (UI:P). The vulnerability does not impact confidentiality, integrity, or availability directly but can lead to indirect compromise through script execution (VC:N/VI:N/VA:N). The scope is limited but significant due to the stored nature of the XSS, which can affect multiple users accessing the compromised resource. No patches or known exploits are currently reported, but the vulnerability's presence in all versions necessitates urgent attention. The technical details were assigned by INCIBE and published in late 2025.

For European organizations, this vulnerability poses a moderate risk primarily through the potential for user session compromise and unauthorized actions within Taclia's web application environment. Organizations in sectors with high reliance on Taclia's solutions—such as finance, healthcare, government, and critical infrastructure—may face increased risk of targeted attacks exploiting this XSS flaw. The stored nature of the vulnerability means that once an attacker uploads a malicious SVG, any user accessing that resource is at risk, potentially leading to widespread impact within an organization. This can result in data leakage, unauthorized transactions, or lateral movement within internal networks. Additionally, regulatory implications under GDPR could arise if personal data is exposed or manipulated through exploitation. The medium severity score reflects the balance between ease of exploitation and the limited direct impact on system confidentiality, integrity, or availability. However, the requirement for user interaction and low privileges needed to exploit the vulnerability means that phishing or social engineering could be used to increase attack success. European organizations must consider the reputational and operational risks associated with such client-side attacks.

To mitigate CVE-2025-41087, European organizations using Taclia's web application should implement the following specific measures: 1) Enforce strict sanitization and validation of all uploaded SVG files, removing or disabling any embedded scripts or event handlers. 2) Employ Content Security Policy (CSP) headers to restrict script execution and reduce the impact of any injected scripts. 3) Disable inline scripting and external script references within SVG files at the application or web server level. 4) Implement robust user input filtering and output encoding on all web pages rendering user-uploaded content. 5) Monitor and audit image upload logs for suspicious or anomalous SVG files. 6) Educate users about the risks of interacting with untrusted content and implement multi-factor authentication to reduce session hijacking risks. 7) Coordinate with Taclia for timely patches or updates once available, and apply them promptly. 8) Consider isolating or sandboxing SVG rendering components to limit script execution context. 9) Regularly conduct security assessments and penetration testing focused on file upload functionalities. 10) Review and update incident response plans to address potential XSS exploitation scenarios.