CVE-2026-2434 is a stored cross-site scripting vulnerability in the Pz-LinkCard WordPress plugin, affecting all versions up to and including 2.5.8.1. The issue stems from improper neutralization of input in the 'blogcard' shortcode attributes, enabling authenticated users with Contributor-level privileges or higher to inject arbitrary web scripts. These scripts persist and execute in the context of any user accessing the compromised page, potentially leading to session hijacking or other script-based attacks. The vulnerability has a CVSS 3.1 base score of 6.4 (medium severity) with network attack vector, low attack complexity, and privileges required at the contributor level. No official fix or patch has been published as of the data provided.

An attacker with Contributor-level access or higher can inject persistent malicious scripts into pages via the vulnerable shortcode attributes. These scripts execute in the browsers of users who visit the injected pages, potentially leading to information disclosure or session hijacking. The impact is limited to confidentiality and integrity with no availability impact. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, restrict Contributor-level access to trusted users only and consider removing or disabling the Pz-LinkCard plugin if feasible. Monitor official vendor channels for updates and apply any released patches promptly.