CVE-2025-0450

Betheme <= 27.6.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom JS

2025-01-20 21:55
stealthcopter

Strategic Overview

Status
Patched in 27.6.2
Affected Theme
Betheme
Affected Version
<= 27.6.1
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2025-0450
View all Betheme vulnerabilities

At a glance

CVE-2025-0450 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Betheme WordPress theme, affecting versions <= 27.6.1. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 27.6.2; sites on affected versions should update now. Disclosed January 2025, reported by stealthcopter.

Vulnerability Overview

The Betheme plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's custom JS functionality in all versions up to, and including, 27.6.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

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 interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Betheme <= 27.6.1 takes an account at Contributor level or above. 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 Betheme the fix is 27.6.2: builds <= 27.6.1 are affected, anything from 27.6.2 onward is not.

Remediation

Update to version 27.6.2, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Betheme 27.6.2 closes this, and updating the theme is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-0450https://www.wordfence.com/threat-intel/vulnerabilities/id/340c14ea-70b9-4f60-84b3-97328432f110https://nvd.nist.gov/vuln/detail/CVE-2025-0450

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C