What is CVE-2026-5711?

CVE-2026-5711 is a medium-severity vulnerability in Pubudu-Malalasekara Post Blocks & Tools, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-08.

How severe is CVE-2026-5711?

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

XSS in Pubudu-Malalasekara Post Blocks & Tools

CVE-2026-5711

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.7th percentile) — read the EPSS interpretation.

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.

Affected products

Pubudu-malalasekara Post Blocks & Tools — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-5711?: CVE-2026-5711 is a medium-severity vulnerability in Pubudu-Malalasekara Post Blocks & Tools, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-08.
How severe is CVE-2026-5711?: Medium severity. CVSS v3 base score is 6.4 out of 10.