CVE-2026-110290
CVE-2026-110290 · WebberZone Top 10 <= 4.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'other_attributes' Block Attribute
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.4 · Medium · EPSS 0.2%
- Published
- Updated
Affected products and versions
webberzone top 10 — popular posts
- Versions
- ≥ 0, ≤ 4.5.2: Affected (semver)
No fix published
Original sources
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4db4a201-a7fa-4764-87cb-c54b64adf560?source=cve
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/class-display.php#L170
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/class-display.php#L153
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/util/class-helpers.php#L693
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blocks.php#L142
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blocks.php#L128
- https://plugins.trac.wordpress.org/changeset/3747022
- https://plugins.trac.wordpress.org/browser/top-10/tags/4.5.3/includes/frontend/class-display.php
- https://nvd.nist.gov/vuln/detail/CVE-2026-110290