CVE-2025-11822 is a stored Cross-Site Scripting vulnerability found in the WP Bootstrap Tabs plugin for WordPress, specifically in the handling of the 'bootstrap_tab' shortcode. The vulnerability stems from insufficient input sanitization and output escaping of user-supplied attributes, allowing authenticated users with contributor-level or higher permissions to inject arbitrary JavaScript code into pages. When other users access these pages, the injected scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or defacement. The vulnerability affects all versions up to and including 1.0.4. The CVSS 3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, privileges required (contributor or above), no user interaction needed, and a scope change due to the impact on other users. No patches or fixes have been released yet, and no known exploits have been observed in the wild. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation. The flaw is particularly dangerous in multi-user WordPress environments where contributors can add content but are not fully trusted. Attackers can leverage this to execute persistent scripts affecting site visitors and administrators, potentially stealing cookies, redirecting users, or injecting malicious payloads.

The primary impact of this vulnerability is on the confidentiality and integrity of user data and site content. Malicious scripts injected by an attacker can steal session cookies, enabling account takeover or privilege escalation. They can also modify page content, deface the website, or redirect users to malicious sites. Since the vulnerability requires contributor-level access, it limits exploitation to insiders or compromised accounts, but the scope is significant because any user visiting the infected page can be affected. The availability of the site is not impacted directly. Organizations relying on this plugin for content presentation risk reputational damage, data leakage, and potential compliance violations if user data is compromised. The lack of a patch increases exposure time, and the widespread use of WordPress amplifies the potential attack surface globally.

Organizations should immediately audit user roles and restrict contributor-level access to trusted users only. Implement strict input validation and output escaping for all shortcode attributes, especially in custom plugins or themes. Until an official patch is released, consider disabling or removing the WP Bootstrap Tabs plugin if feasible. Employ Web Application Firewalls (WAFs) with rules to detect and block suspicious script injections in shortcode parameters. Monitor logs for unusual contributor activity or unexpected content changes. Educate content contributors about the risks of injecting untrusted code or HTML. Regularly update WordPress core and plugins once patches become available. Additionally, implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts and reduce the impact of potential XSS attacks.