CVE-2025-49312: Echo RSS Feed Plugin XSS Vulnerability

CVE-2025-49312 Overview

CVE-2025-49312 is a reflected cross-site scripting (XSS) vulnerability in the CodeRevolution Echo RSS Feed Post Generator Plugin for WordPress. The flaw exists in the rss-feed-post-generator-echo plugin and affects all versions from initial release through 5.4.8.1. Attackers can inject malicious scripts that execute in the browser of any user who follows a crafted link. The vulnerability is categorized under [CWE-79] Improper Neutralization of Input During Web Page Generation.

Critical Impact
Reflected XSS enables session theft, credential harvesting, and administrative action abuse on WordPress sites running the vulnerable plugin when an authenticated user is lured into clicking a crafted URL.

Affected Products

CodeRevolution Echo RSS Feed Post Generator Plugin for WordPress versions through 5.4.8.1
WordPress installations with the rss-feed-post-generator-echo plugin enabled
All deployments not yet patched beyond version 5.4.8.1

Discovery Timeline

2025-06-17 - CVE-2025-49312 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-49312

Vulnerability Analysis

The Echo RSS Feed Post Generator Plugin fails to neutralize user-supplied input before reflecting it back in HTTP responses. An attacker crafts a URL containing JavaScript payloads in a request parameter handled by the plugin. When a victim visits the link, the plugin echoes the unsanitized input into the rendered HTML, causing the browser to execute attacker-controlled script in the context of the WordPress site.

The attack requires user interaction, meaning the victim must click a malicious link or load a page that triggers the request. Because the attack scope changes, code executes in the security context of the WordPress domain rather than the attacker's origin. This enables cross-origin impact on session state and DOM access. The EPSS score is 0.185% with a percentile of 39.95, indicating limited observed exploitation activity at present.

Root Cause

The plugin echoes request parameters into HTML output without applying contextual encoding or input filtering. WordPress provides escaping functions such as esc_html(), esc_attr(), and wp_kses(), but the vulnerable code paths do not invoke them before rendering tainted data. This is a classic [CWE-79] reflected XSS pattern.

Attack Vector

An attacker constructs a URL targeting a vulnerable plugin endpoint with a JavaScript payload embedded in a query parameter. The attacker delivers the URL through phishing emails, malicious advertisements, or social media. When an authenticated WordPress administrator clicks the link, the injected script executes with the administrator's privileges. The script can exfiltrate session cookies, modify site content, create rogue administrative accounts, or pivot to further compromise. See the Patchstack WordPress Vulnerability Advisory for additional technical context.

Detection Methods for CVE-2025-49312

Indicators of Compromise

HTTP requests to rss-feed-post-generator-echo plugin endpoints containing <script>, javascript:, onerror=, or URL-encoded variants such as %3Cscript%3E
Referrer headers originating from external phishing domains targeting WordPress admin sessions
Unexpected creation of WordPress administrator accounts or modification of user roles following plugin interaction
Outbound requests from administrator browsers to attacker-controlled domains immediately after visiting plugin URLs

Detection Strategies

Inspect web server access logs for query strings containing HTML or JavaScript metacharacters directed at the vulnerable plugin path
Deploy a web application firewall rule that blocks reflected XSS patterns in parameters handled by rss-feed-post-generator-echo
Monitor WordPress audit logs for privileged actions performed shortly after administrators load plugin URLs with suspicious parameters

Monitoring Recommendations

Enable verbose HTTP logging on the WordPress front-end and forward logs to a centralized analytics platform for query parameter inspection
Alert on anomalous administrative activity, particularly user creation, plugin installation, and theme file edits
Track browser-side Content Security Policy (CSP) violation reports to surface attempted script injection

How to Mitigate CVE-2025-49312

Immediate Actions Required

Deactivate the Echo RSS Feed Post Generator Plugin until a patched release is installed
Apply any vendor update beyond version 5.4.8.1 as soon as CodeRevolution publishes a fix
Force a password reset and session invalidation for all WordPress administrators who may have clicked suspicious links
Audit the WordPress user table for unauthorized accounts and elevated roles

Patch Information

At the time of NVD publication, the advisory indicates the issue affects the plugin from initial release through version 5.4.8.1. Administrators should monitor the Patchstack advisory and the official WordPress plugin repository for a fixed release and apply it immediately upon availability.

Workarounds

Deploy a web application firewall with rules that block reflected XSS payloads targeting the plugin's request parameters
Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Restrict access to WordPress administrative interfaces via IP allowlisting or VPN to reduce phishing exposure
Remove the plugin entirely if RSS feed post generation is not a business-critical feature

bash

# Example WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate rss-feed-post-generator-echo

# Example nginx rule to block common XSS patterns on the plugin path
location ~* /wp-content/plugins/rss-feed-post-generator-echo/ {
    if ($args ~* "(<|%3C)script|javascript:|onerror=") {
        return 403;
    }
}