CVE-2025-62921 identifies a DOM-based Cross-site Scripting vulnerability in the Pagup Bulk Auto Image Title Attribute plugin, versions up to 2.0.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, specifically in how the plugin handles image title attributes in bulk operations. This improper input handling allows attackers to inject malicious JavaScript code into the Document Object Model (DOM), which executes in the context of the victim's browser. The attack vector is remote network-based with low attack complexity, requiring the attacker to have low privileges (PR:L) and user interaction (UI:R), such as tricking a user into clicking a crafted link or visiting a malicious page. The vulnerability affects confidentiality, integrity, and availability, as attackers can steal session tokens, manipulate page content, or cause denial of service. The CVSS 3.1 base score is 6.5, indicating medium severity, with a scope change (S:C) meaning the vulnerability affects components beyond the initially vulnerable component. No known exploits are currently reported in the wild, but the vulnerability's presence in a widely used WordPress plugin increases the risk of exploitation. The lack of available patches at the time of disclosure necessitates immediate attention to mitigation strategies. The vulnerability is particularly relevant for websites that rely on the Bulk Auto Image Title Attribute plugin for SEO or accessibility improvements, as attackers could leverage this to compromise site visitors or administrators.

For European organizations, the impact of CVE-2025-62921 can be significant, especially for those operating websites using the Pagup Bulk Auto Image Title Attribute plugin. Successful exploitation could lead to session hijacking, unauthorized actions on behalf of users, defacement of websites, or distribution of malware via injected scripts. This can damage organizational reputation, lead to data breaches involving personal or sensitive information, and disrupt business operations. Given the medium CVSS score but the scope change, the vulnerability could affect multiple components or users beyond the initially targeted plugin, amplifying the risk. Organizations in sectors such as e-commerce, government, healthcare, and media, which rely heavily on web presence and user trust, are particularly vulnerable. Additionally, compliance with GDPR and other data protection regulations means that exploitation leading to data leakage could result in regulatory penalties and legal consequences. The absence of known exploits currently provides a window for proactive defense, but the risk of future exploitation remains high due to the popularity of WordPress plugins in Europe.

1. Monitor for official patches or updates from Pagup and apply them immediately once available to remediate the vulnerability. 2. Until patches are released, implement strict Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 3. Employ web application firewalls (WAF) with rules designed to detect and block DOM-based XSS payloads targeting this plugin. 4. Conduct thorough input validation and output encoding on all user-supplied data, especially in custom code interacting with the plugin. 5. Educate users and administrators about the risks of clicking unknown links or interacting with untrusted content that could trigger the vulnerability. 6. Regularly audit and monitor web application logs for suspicious activities indicative of exploitation attempts. 7. Consider temporarily disabling or replacing the Bulk Auto Image Title Attribute plugin with alternative solutions if immediate patching is not feasible. 8. Use security scanners capable of detecting DOM-based XSS vulnerabilities to identify any residual issues in the environment.