CVE-2026-5711 Post Blocks & Tools <= 1.3.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'sliderStyle' Block Attribute
Authenticated attackers with author privileges can inject arbitrary scripts via the sliderStyle attribute, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5711?
CVE-2026-5711 is a medium-severity cross-site scripting vulnerability in pubudu-malalasekara Post Blocks & Tools, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-5711?
How do I fix CVE-2026-5711?
No fix has been published for CVE-2026-5711 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-5711 being exploited?
There is no known exploitation of CVE-2026-5711 in the wild and no public exploit code.
Sources
Also known as GHSA-pxvw-54xc-72wm.