CVE-2023-49179: 
WordPress vulnerability analysis and mitigation

A Cross-site Scripting (XSS) vulnerability was identified in N.O.U.S. Open Useful and Simple Event post WordPress plugin, tracked as CVE-2023-49179. The vulnerability was discovered by researcher thiennv and publicly disclosed on November 29, 2023. This security issue affects versions up to 5.9.0 of the Event post plugin and allows authenticated users with Contributor or higher privileges to perform stored XSS attacks (Patchstack, Wordfence).

The vulnerability is classified as an Improper Neutralization of Input During Web Page Generation (CWE-79). It received a CVSS v3.1 base score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L according to Patchstack's assessment. The National Vulnerability Database (NVD) rated it slightly lower at 5.4 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N (NVD).

The vulnerability allows malicious actors to inject malicious scripts, including redirects, advertisements, and other HTML payloads into the website. These injected scripts are executed when guests visit the affected site. The attack requires an authenticated user with at least Contributor-level privileges (Patchstack).

The vulnerability has been patched in version 5.9.1 of the Event post plugin. Website administrators are advised to update to version 5.9.1 or later to remove the vulnerability. Patchstack users can enable auto-update functionality for vulnerable plugins as an additional security measure (Patchstack).