What is the CVSS score of CVE-2026-25369?

CVE-2026-25369 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

Which versions of Flexmls Idx are affected by CVE-2026-25369?

A reflected cross-site scripting (XSS) vulnerability in Flexmls IDX (versions through 3.15.9) allows attackers to inject malicious code that executes in users' browsers, potentially compromising user…

How to fix or mitigate CVE-2026-25369?

Within 24 hours: Inventory all Flexmls IDX deployments and confirm installed versions; notify vendor for patch timeline and workarounds. Within 7 days: Deploy Web Application Firewall (WAF) rules to block XSS payloads; restrict administrative access to the application; conduct user awareness training on phishing/suspicious links. Within 30 days: Implement input validation and output encoding controls if vendor guidance permits; evaluate alternative MLS platforms; establish security monitoring for XSS attack attempts.

Flexmls Idx CVE-2026-25369

EUVD-2026-12445 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-16 Patchstack

XSS Flexmls Idx

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Re-analysis Queued

Apr 23, 2026 - 16:12 vuln.today

cvss_changed

EUVD ID Assigned

Mar 16, 2026 - 15:00 euvd

EUVD-2026-12445

Analysis Generated

Mar 16, 2026 - 15:00 vuln.today

CVE Published

Mar 16, 2026 - 14:13 nvd

HIGH 7.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Flexmls Flexmls® IDX allows Reflected XSS.This issue affects Flexmls® IDX: from n/a through 3.15.9.

AnalysisAI

A reflected Cross-Site Scripting (XSS) vulnerability exists in the Flexmls® IDX WordPress plugin through version 3.15.9, allowing attackers to inject malicious scripts into web pages that execute in victims' browsers when they click specially crafted links. The vulnerability has a CVSS score of 7.1 and requires user interaction but can impact confidentiality, integrity, and availability across different origins due to its scope change characteristic. While not currently listed in CISA KEV or showing high EPSS scores, the vulnerability represents a moderate risk for WordPress sites using this real estate listing plugin.

Technical ContextAI

The Flexmls® IDX plugin (CPE: cpe:2.3:a:flexmls:flexmls®_idx:*:*:*:*:*:*:*:*) is a WordPress plugin used for integrating MLS (Multiple Listing Service) real estate data into websites. The vulnerability stems from CWE-79 (Improper Neutralization of Input During Web Page Generation), where user-supplied input is not properly sanitized before being reflected back in the HTML response. This allows attackers to inject arbitrary JavaScript or HTML that executes in the context of the vulnerable domain when a victim visits a malicious URL containing the payload.

RemediationAI

Upgrade the Flexmls® IDX WordPress plugin to version 3.15.10 or later, which should contain the security fix for this XSS vulnerability. Until patching is possible, implement Content Security Policy (CSP) headers to restrict inline script execution and consider using a Web Application Firewall (WAF) to filter malicious XSS payloads. Monitor the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/flexmls-idx/vulnerability/wordpress-flexmls-idx-plugin-3-15-9-reflected-cross-site-scripting-xss-vulnerability for updates and ensure WordPress core and all plugins are kept current.