What is CVE-2025-15702?

CVE-2025-15702 is a high-severity vulnerability in Cloud Blocks, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-11-05.

How severe is CVE-2025-15702?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Cloud Blocks

CVE-2025-15702

The Cloud Blocks WordPress plugin through 1.1.8 does not perform any authorisation or sanitisation when storing block asset URLs, allowing unauthenticated users to store malicious scripts that are executed in the browser of any privileged user, such as an administrator, who opens the block editor.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-05 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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

Cloud Blocks

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/586f975b-1448-4ff5-b030-aa7bcdd45318/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2025-15702?: CVE-2025-15702 is a high-severity vulnerability in Cloud Blocks, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-11-05.
How severe is CVE-2025-15702?: High severity. CVSS v3 base score is 8.8 out of 10.