Medium severity · published Aug 15, 2025
CVE-2025-5844
Radius Blocks <= 2.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via subHeadingTagName Parameter
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
The Radius Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘subHeadingTagName’ parameter in all versions up to, and including, 2.2.1 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RB
Radius Blocks – WordPress Gutenberg Blocks · techlabpro1
through 2.2.1 · source: vendor
Affected product
RB
Radius Blocks – WordPress Gutenberg Blocks
techlabpro1
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-5844
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/radius-blocks/tags/2.2.1/templates/blocks/advanced-heading/layout.php#L29
wordpress.org
https://wordpress.org/plugins/radius-blocks/#developers
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/ff41796a-0ba8-468f-8b79-274064da154e?source=cve