CVE-2026-6236 is a stored cross-site scripting vulnerability in the Posts map WordPress plugin by lucdecri, affecting all versions up to and including 0.1.3. The issue is due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of the 'name' shortcode attribute. This allows authenticated users with contributor-level permissions or higher to inject malicious scripts that execute in the context of other users viewing the injected pages. The vulnerability has a CVSS 3.1 score of 6.4 (medium severity), with attack vector network, low attack complexity, privileges required at the low level, no user interaction needed, and impacts confidentiality and integrity with no availability impact. No official fix or patch is currently documented, and no known exploits have been reported.

An attacker with contributor-level or higher access can inject malicious scripts into pages via the vulnerable shortcode attribute. These scripts execute in the browsers of users who view the affected pages, potentially leading to unauthorized actions or data disclosure limited to the confidentiality and integrity impacts described. There is no impact on availability. The vulnerability requires authenticated access, limiting exposure to users with some level of trust within the WordPress environment.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit contributor-level access to trusted users only. Consider disabling or removing the Posts map plugin if it is not essential. Monitor official lucdecri or WordPress security channels for updates regarding patches or mitigations.