CVE-2026-1939 is a stored cross-site scripting (XSS) vulnerability identified in the Percent to Infograph plugin for WordPress, developed by cutesalah. This vulnerability exists in all versions up to and including 1.0 due to insufficient sanitization and escaping of user input in the percent_to_graph shortcode attributes. Specifically, the plugin fails to properly neutralize malicious scripts embedded in user-supplied attributes, allowing authenticated users with contributor-level permissions or higher to inject arbitrary JavaScript code into WordPress pages. When other users access these compromised pages, the injected scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or unauthorized actions within the WordPress environment. The CVSS 3.1 base score of 6.4 reflects a medium severity, with an attack vector over the network, low complexity, and requiring privileges equivalent to contributor access, but no user interaction is necessary for exploitation. The vulnerability impacts confidentiality and integrity but does not affect system availability. No patches or official fixes have been published at the time of disclosure, and no known exploits are currently in the wild. The vulnerability is cataloged under CWE-79, indicating improper neutralization of input during web page generation. The issue was reserved and published in early 2026, with Wordfence as the assigner. Given the widespread use of WordPress and the popularity of plugins for data visualization, this vulnerability poses a tangible risk to websites using this plugin without mitigation.

The primary impact of CVE-2026-1939 is the potential for stored cross-site scripting attacks that compromise the confidentiality and integrity of affected WordPress sites. Attackers with contributor-level access can inject malicious scripts that execute in the browsers of site visitors or administrators, leading to session hijacking, theft of sensitive data, unauthorized actions, or defacement. Although availability is not directly impacted, the loss of trust and potential data breaches can have significant reputational and operational consequences. Organizations relying on the Percent to Infograph plugin for data visualization risk exposure to targeted attacks, especially if they have multiple contributors or allow user-generated content. The vulnerability could be leveraged as a foothold for further attacks within the WordPress environment or to pivot to other internal systems. Since exploitation requires authenticated access, the risk is somewhat mitigated by access controls; however, compromised contributor accounts or insider threats increase the likelihood of exploitation. The absence of known public exploits currently limits immediate widespread impact but does not preclude future exploitation attempts.

To mitigate CVE-2026-1939, organizations should first verify if they are using the Percent to Infograph plugin and identify the version in use. Since no official patches are currently available, immediate mitigation includes restricting contributor-level access to trusted users only and auditing existing content for suspicious shortcode usage. Implementing a Web Application Firewall (WAF) with custom rules to detect and block malicious script patterns in shortcode attributes can reduce risk. Administrators should enforce strong authentication and monitor contributor activities for anomalies. Additionally, disabling or removing the vulnerable plugin until a patch is released is a prudent step. Developers and site administrators can also apply manual input sanitization and output escaping in the plugin code if feasible. Regular backups and incident response plans should be in place to recover from potential compromises. Monitoring security advisories from the plugin vendor and WordPress security communities for updates or patches is essential for timely remediation.