CVE-2025-62921 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the Pagup Bulk Auto Image Title Attribute plugin, specifically versions up to 2.0.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be injected into the Document Object Model (DOM). Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side, where the injected script manipulates the DOM environment in the victim’s browser. This can lead to unauthorized actions such as cookie theft, session hijacking, or defacement. The CVSS vector indicates that the attack can be launched remotely over the network (AV:N) with low attack complexity (AC:L), but requires privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable component. The impact is rated as partial on confidentiality, integrity, and availability (C:L/I:L/A:L). No known exploits have been reported yet, but the vulnerability is publicly disclosed and should be addressed promptly. The plugin is commonly used in WordPress environments to automate the addition of title attributes to images in bulk, making it a target for attackers aiming to exploit web content management systems. The lack of a patch link suggests that a fix may not yet be available, increasing the urgency for mitigation through alternative controls.

For European organizations, this vulnerability could lead to unauthorized script execution within users’ browsers, potentially resulting in data theft, session hijacking, or defacement of websites. Organizations relying on the Pagup Bulk Auto Image Title Attribute plugin for SEO or accessibility enhancements on their websites may inadvertently expose visitors to malicious payloads. This can damage reputation, lead to regulatory non-compliance (e.g., GDPR breaches if personal data is compromised), and disrupt business operations. The medium severity rating reflects that while the vulnerability requires some privileges and user interaction, the potential for lateral movement or further exploitation exists. Attackers could leverage this vulnerability to implant persistent scripts or conduct phishing campaigns targeting European users. The impact is particularly significant for sectors with high web traffic or sensitive data, such as e-commerce, finance, healthcare, and government services.

1. Monitor the Pagup vendor’s official channels for security patches and apply updates immediately once available. 2. Until a patch is released, disable or remove the Bulk Auto Image Title Attribute plugin if feasible, especially on high-risk or public-facing sites. 3. Implement strict input validation and output encoding on all user-controllable inputs to prevent injection of malicious scripts. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focusing on DOM-based XSS vectors within web applications. 6. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content that could trigger the vulnerability. 7. Use web application firewalls (WAFs) with rules tailored to detect and block DOM-based XSS payloads. 8. Monitor web logs and browser console errors for signs of exploitation attempts or anomalous script behavior.