CVE-2025-12880 is a stored cross-site scripting vulnerability in the Progress Bar Blocks for Gutenberg WordPress plugin. It affects all versions up to and including 1.0.0. The flaw allows authenticated users with Author-level privileges or above to upload SVG files containing malicious scripts. Due to inadequate sanitization and escaping of SVG content, these scripts execute in the context of users viewing the affected pages. The vulnerability has a CVSS 3.1 base score of 5.4, reflecting medium severity with network attack vector, low attack complexity, and requiring privileges with user interaction.

Successful exploitation allows an authenticated attacker with Author-level access to inject and execute arbitrary web scripts in the context of users accessing the SVG files. This can lead to limited confidentiality and integrity impacts such as session hijacking or content manipulation. There is no direct availability impact. No known exploits are reported in the wild.

No official patch or fix is currently available for this vulnerability. Users should monitor the vendor's advisories for updates. As a temporary mitigation, restrict SVG file uploads to trusted users only and consider disabling SVG uploads if possible. Review user privileges to limit Author-level access where feasible. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.