What is CVE-2026-110290?

CVE-2026-110290 is a medium-severity vulnerability in Ajay Webberzone Top 10 — Popular Posts, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-16.

How severe is CVE-2026-110290?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Ajay Webberzone Top 10 — Popular Posts

CVE-2026-110290

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Ajay Webberzone Top 10 — Popular Posts

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-110290?: CVE-2026-110290 is a medium-severity vulnerability in Ajay Webberzone Top 10 — Popular Posts, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-16.
How severe is CVE-2026-110290?: Medium severity. CVSS v3 base score is 6.4 out of 10.