Strategic Overview
- Status
- Patched in 1.4.7
- Affected Plugin
- Snow Storm
- Affected Version
<= 1.4.6- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2025-30858
At a glance
CVE-2025-30858 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Snow Storm WordPress plugin, affecting versions <= 1.4.6. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.4.7; sites on affected versions should update now. Disclosed April 2025, reported by Skalucy.
Vulnerability Overview
The Snow Storm plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 1.4.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Snow Storm <= 1.4.6 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Snow Storm the fix is 1.4.7: builds <= 1.4.6 are affected, anything from 1.4.7 onward is not.
Remediation
Update to version 1.4.7, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Snow Storm: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Snow Storm 1.4.7 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C