CVE-2025-5540: 
WordPress vulnerability analysis and mitigation

The Event RSVP and Simple Event Management Plugin for WordPress contains a Stored Cross-Site Scripting vulnerability (CVE-2025-5540) discovered in versions up to and including 4.1.0. The vulnerability was disclosed on June 25, 2025, affecting the plugin's 'emdmbmeta' shortcode functionality (NVD CVE, Wiz).

The vulnerability stems from insufficient input sanitization and output escaping on user-supplied attributes in the plugin's 'emdmbmeta' shortcode. The issue has been assigned a CVSS v3.1 score of 6.4 (Medium) with the vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. The vulnerability is classified as CWE-79: Improper Neutralization of Input During Web Page Generation (NVD CVE).

When exploited, this vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. These malicious scripts will execute whenever any user accesses the compromised page, potentially leading to theft of sensitive information or manipulation of page content (Wiz).

The plugin has been temporarily closed as of June 19, 2025, pending a full security review. Users are advised to disable the plugin until a patched version is released (WordPress Plugin).