Vulnerability in ajay WebberZone Top 10 — Popular Posts

[ Description ]Official description

The WebberZone Top 10 — Popular Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'other_attributes (parsed to inject instance_id) + undeclared is_widget' parameter in all versions up to, and including, 4.5.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The exploit requires setting the undeclared is_widget flag to '1' via block JSON, which activates the vulnerable code path that concatenates the attacker-controlled instance_id value into an unescaped HTML class attribute.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blo…
• plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blo…
• plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/class-display.php
• plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/class-display.php
• plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/util/class-helpers.php
• plugins.trac.wordpress.org/browser/top-10/tags/4.5.3/includes/frontend/class-display.php
• plugins.trac.wordpress.org/changeset/3747022
• www.wordfence.com/threat-intel/vulnerabilities/id/4db4a201-a7fa-4764-87cb-c54b64adf560