CVE-2025-0863: Flexmls® IDX <= 3.14.27 - Authenticated (Contributor+) Stored Cross-Site Scripting
Description
The Flexmls® IDX Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'idx_frame' shortcode in all versions up to, and including, 3.14.27 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.
Classification
CVE ID: CVE-2025-0863
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: flexmls
Product: Flexmls® IDX Plugin
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 6.74% (scored less or equal to compared to others)
EPSS Date: 2025-04-05 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-0863https://www.wordfence.com/threat-intel/vulnerabilities/id/1c8e814b-3828-4b3f-a9ad-b3758ab9b109?source=cve
https://plugins.trac.wordpress.org/browser/flexmls-idx/tags/3.14.25/flexmls_connect.php#L92
https://plugins.trac.wordpress.org/browser/flexmls-idx/tags/3.14.25/lib/base.php#L220
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3251292%40flexmls-idx&new=3251292%40flexmls-idx&sfp_email=&sfph_mail=