CVE-2025-22547 identifies a stored Cross-site Scripting (XSS) vulnerability in the JK Html To Pdf tool developed by jaykrishnang, affecting all versions up to 1.0.0. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing attackers to inject malicious JavaScript code that is persistently stored and executed in the context of users’ browsers when they access affected content. Stored XSS is particularly dangerous because the malicious payload is saved on the server and delivered to multiple users, increasing the attack surface and potential impact. The vulnerability does not require authentication, meaning attackers can exploit it without valid credentials, and no user interaction beyond visiting a compromised page is necessary for exploitation. While no public exploits have been reported yet, the flaw could enable attackers to steal session cookies, perform actions on behalf of users, deface content, or deliver further malware. JK Html To Pdf is a tool used to convert HTML content into PDF documents, often integrated into web applications or services that generate PDFs dynamically. The improper input neutralization likely occurs in the handling of HTML content before conversion, where malicious scripts embedded in input fields are not sanitized properly. This vulnerability highlights the importance of rigorous input validation and output encoding in web applications, especially those that process and render user-generated content. The lack of a CVSS score requires an expert severity assessment based on the vulnerability’s characteristics and potential impact.

The impact of CVE-2025-22547 is significant for organizations using JK Html To Pdf in web-facing applications or services. Successful exploitation can lead to the execution of arbitrary JavaScript in users’ browsers, compromising confidentiality by stealing session tokens, cookies, or sensitive data. Integrity can be undermined by unauthorized modification of displayed content or execution of unauthorized actions on behalf of users. Availability impact is generally limited but could occur if attackers use XSS to launch further attacks such as denial-of-service or malware delivery. The stored nature of the XSS increases the risk as multiple users can be affected once malicious content is injected. Organizations handling sensitive user data or financial transactions are at higher risk due to potential account takeover or fraud. Additionally, reputational damage and regulatory penalties may result from breaches caused by this vulnerability. The ease of exploitation without authentication and the broad scope of affected versions amplify the threat. Although no known exploits are currently in the wild, the vulnerability should be treated as a high priority to prevent future attacks.

To mitigate CVE-2025-22547, organizations should first seek and apply any available patches or updates from the vendor jaykrishnang for JK Html To Pdf. In the absence of patches, implement strict input validation to reject or sanitize any potentially malicious input before processing. Employ context-aware output encoding (e.g., HTML entity encoding) when rendering user-generated content to prevent script execution. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Conduct thorough code reviews focusing on input handling and output generation in the PDF conversion process. Monitor logs and user reports for signs of XSS exploitation attempts. Consider isolating or sandboxing the PDF generation functionality to limit exposure. Educate developers and administrators about secure coding practices related to XSS. Finally, implement web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting this component.