Vulnerability · Published Apr 8, 2026 · Assigned by Wordfence
CVE-2026-5711Post Blocks & Tools <= 1.3.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'sliderStyle' Block Attribute
Medium 6.4
In plain English
A medium-severity cross-site scripting in Post Blocks & Tools from pubudu-malalasekara. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Official description
The Post Blocks & Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sliderStyle' block attribute in the Posts Slider block in all versions up to, and including, 1.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pubudu-malalasekara | Post Blocks & Tools | 0 – through 1.3.0 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/aeada6dc-0851-45e8-ada9-ff0427b7f17a?source=cve
- https://plugins.trac.wordpress.org/browser/bnm-blocks/tags/1.3.0/src/blocks/posts/slider/view.php#L237
- https://plugins.trac.wordpress.org/browser/bnm-blocks/trunk/src/blocks/posts/slider/view.php#L237
- https://plugins.trac.wordpress.org/browser/bnm-blocks/tags/1.3.1/src/blocks/posts/slider/view.php
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3500959%40bnm-blocks%2Ftrunk&old=3456918%40bnm-blocks%2Ftrunk&sfp_email=&sfph_mail=