CVE-2026-3311 is a stored cross-site scripting vulnerability (CWE-79) in The Plus Addons for Elementor plugin for WordPress, affecting all versions up to and including 6.4.9. The issue is due to improper neutralization of input in the Progress Bar shortcode, where user-supplied attributes are not adequately sanitized or escaped. Authenticated users with contributor-level privileges or higher can exploit this to inject arbitrary JavaScript that executes in the context of other users viewing the injected page. The vulnerability has a CVSS 3.1 score of 6.4, reflecting a medium severity impact with network attack vector, low attack complexity, and no user interaction required. No vendor advisory or patch is currently available, and no known exploits have been reported.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the Progress Bar shortcode. These scripts execute in the browsers of users who visit the compromised pages, potentially leading to theft of session tokens, defacement, or other client-side impacts. The vulnerability does not affect availability and requires authenticated access, limiting the attack surface. There are no reports of active exploitation.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or avoiding use of the Progress Bar shortcode. Monitor for updates from the plugin vendor regarding patches or official mitigations.