CVE-2026-110290 json
WebberZone Top 10 <= 4.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'other_attributes' Block Attribute
published 2026-10-16 24 d ago modified 2026-10-16 23 d ago also EUVD-2026-102790
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 23 d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- ajay WebberZone Top 10 — Popular Posts
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4db4a201-a7fa-4764-87cb-c54b64adf560?source=cve
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.2/includes/frontend/class-display.php#L170
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.2/includes/frontend/class-display.php#L153
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.2/includes/util/class-helpers.php#L693
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blocks.php#L142
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.2/includes/frontend/blocks/class-blocks.php#L128
- plugins.trac.wordpress.org /changeset/3747022
- plugins.trac.wordpress.org /browser/top-10/tags/4.5.3/includes/frontend/class-display.php
Sources
- CVE List CVE-2026-110290
- NVD CVE-2026-110290
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.