CVE-2026-1903 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Ravelry Designs Widget plugin for WordPress, specifically in all versions up to and including 1.0.0. The vulnerability stems from improper neutralization of input during web page generation (CWE-79), where the 'layout' attribute of the 'sb_ravelry_designs' shortcode does not undergo sufficient sanitization or output escaping. Authenticated users with contributor-level access or higher can exploit this flaw by injecting arbitrary JavaScript code into pages that utilize this shortcode. When other users visit these pages, the injected scripts execute in their browsers, potentially compromising session tokens, cookies, or enabling further attacks such as privilege escalation or data theft. The CVSS 3.1 base score of 6.4 reflects a medium severity, with an attack vector over the network, low attack complexity, requiring privileges (PR:L), no user interaction, and a scope change (S:C) indicating that the vulnerability affects resources beyond the initially compromised component. The impact affects confidentiality and integrity but not availability. No patches or updates have been linked yet, and no known exploits are reported in the wild, but the vulnerability's presence in a popular CMS plugin makes it a notable risk. The vulnerability was published on February 14, 2026, and assigned by Wordfence. Given the nature of WordPress plugins and their widespread use, this vulnerability could be leveraged in targeted attacks against websites that allow contributor-level users to add or edit content.

For European organizations, the impact of CVE-2026-1903 can be significant, especially for those relying on WordPress sites with the Ravelry Designs Widget plugin installed. Exploitation can lead to unauthorized script execution in users' browsers, resulting in session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of legitimate users. This can damage organizational reputation, lead to data breaches, and potentially facilitate further attacks within the network. Organizations with contributor-level user roles on their WordPress sites are particularly vulnerable, as these roles can be leveraged to inject malicious content. The vulnerability does not affect availability directly but compromises confidentiality and integrity, which can have regulatory and compliance implications under GDPR and other European data protection laws. Additionally, e-commerce, community, and membership sites are at higher risk due to the potential for abuse of user sessions and credentials. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often weaponize such vulnerabilities once publicly disclosed.

1. Immediately review and restrict contributor-level and higher user permissions on WordPress sites using the Ravelry Designs Widget plugin to trusted individuals only. 2. Implement strict input validation and output escaping for all shortcode attributes, especially the 'layout' attribute, either by applying available patches when released or by manually sanitizing inputs via custom code or security plugins. 3. Monitor website content for unauthorized script injections or unusual shortcode usage. 4. Employ Web Application Firewalls (WAFs) configured to detect and block XSS payloads targeting the affected shortcode. 5. Educate content contributors about the risks of injecting untrusted content and enforce content review workflows before publishing. 6. Regularly update WordPress core, plugins, and themes to the latest versions once a patch for this vulnerability is available. 7. Conduct security audits and penetration testing focusing on user-generated content and shortcode processing. 8. Consider disabling or replacing the Ravelry Designs Widget plugin if immediate patching is not feasible. 9. Use Content Security Policy (CSP) headers to limit the impact of potential XSS attacks by restricting script sources. 10. Log and analyze user activities related to shortcode usage to detect potential exploitation attempts early.