CVE-2025-1703: Ultimate Blocks <= 3.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via content Parameter
Description
The Ultimate Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘content’ parameter in all versions up to, and including, 3.2.7 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.
Classification
CVE ID: CVE-2025-1703
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.4
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: ultimateblocks
Product: Ultimate Blocks – WordPress Blocks Plugin
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 10.25% (scored less or equal to compared to others)
EPSS Date: 2025-04-24 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-1703https://www.wordfence.com/threat-intel/vulnerabilities/id/a2520d98-3cee-4431-bf9c-b2fd01a584ce?source=cve
https://plugins.trac.wordpress.org/browser/ultimate-blocks/trunk/src/extensions/responsive-control/class-responsive-control.php#L46
https://wordpress.org/plugins/ultimate-blocks/#developers
https://plugins.trac.wordpress.org/changeset/3260377
https://plugins.trac.wordpress.org/changeset/3260377/ultimate-blocks/trunk/src/extensions/responsive-control/class-responsive-control.php