CVE-2026-1923: Social Rocket WordPress Plugin XSS Flaw

CVE-2026-1923 Overview

The Social Rocket – Social Sharing Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the id parameter in all versions up to, and including, 1.3.4.2. The vulnerability exists due to insufficient input sanitization and output escaping, which allows authenticated attackers with Subscriber-level access and above to inject arbitrary web scripts into pages. These malicious scripts execute whenever a user accesses an injected page, potentially leading to session hijacking, credential theft, or malicious redirects.

Critical Impact

Authenticated attackers can inject persistent malicious scripts that execute in victims' browsers, enabling session theft, phishing attacks, and unauthorized actions on behalf of legitimate users.

Affected Products

• Social Rocket – Social Sharing Plugin for WordPress versions up to and including 1.3.4.2
• WordPress installations running vulnerable versions of Social Rocket plugin
• Any site with users having Subscriber-level or higher access on affected installations

Discovery Timeline

• April 23, 2026 - CVE-2026-1923 published to NVD
• April 23, 2026 - Last updated in NVD database

Technical Details for CVE-2026-1923

Vulnerability Analysis

This Stored Cross-Site Scripting vulnerability (CWE-79) affects the Social Rocket plugin's handling of the id parameter. The core issue stems from the plugin accepting user-controlled input and storing it without proper sanitization, then reflecting that input back to users without adequate output escaping. This classic XSS pattern allows malicious JavaScript code to be permanently stored within the application and executed in the context of any user who views the affected content.

The attack requires only Subscriber-level authentication, which is significant because WordPress Subscriber accounts are the lowest privilege level that authenticated users can have. Many WordPress sites allow open registration at the Subscriber level, making this vulnerability accessible to a wider pool of potential attackers. The stored nature of this XSS means the payload persists across page loads and sessions, affecting all users who view the compromised content.

Root Cause

The root cause of this vulnerability is insufficient input sanitization and output escaping in the Social Rocket plugin's codebase. When processing the id parameter, the plugin fails to properly validate that the input contains only expected characters and formats. Additionally, when this data is rendered back to users, proper output encoding is not applied to neutralize potentially malicious HTML or JavaScript content.

WordPress provides several built-in functions for sanitizing and escaping user input such as sanitize_text_field(), esc_attr(), and esc_html(), but the vulnerable code path does not adequately utilize these security mechanisms.

Attack Vector

The attack is network-based and requires low privileges (Subscriber-level access). An attacker would authenticate to a vulnerable WordPress site and inject malicious JavaScript through the id parameter. Since this is a stored XSS vulnerability, the payload is saved to the database and served to any user who subsequently views the affected page.

Attack scenarios include:

• Injecting JavaScript to steal session cookies and send them to an attacker-controlled server
• Redirecting administrative users to phishing pages
• Modifying page content to deface the site or spread misinformation
• Triggering unauthorized administrative actions when admins view compromised pages

The vulnerability mechanism involves improper handling of user input in the id parameter. For technical details on the specific code changes that address this issue, refer to the WordPress Changeset Update and the Wordfence Vulnerability Report.

Detection Methods for CVE-2026-1923

Indicators of Compromise

• Unexpected JavaScript code or HTML tags stored in database fields related to the Social Rocket plugin
• Suspicious id parameter values containing <script> tags, event handlers (e.g., onerror, onload), or encoded JavaScript
• User reports of unexpected browser behavior, pop-ups, or redirects on pages using Social Rocket functionality
• Server logs showing repeated POST requests to Social Rocket endpoints with suspicious payloads

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in request parameters
• Deploy SentinelOne Singularity to monitor for suspicious script execution and browser-based attack patterns
• Conduct regular security audits of WordPress plugin database tables for signs of injected content
• Enable WordPress audit logging to track changes made by Subscriber-level users

Monitoring Recommendations

• Monitor WordPress access logs for unusual patterns of POST requests to Social Rocket plugin endpoints
• Set up alerts for new user registrations at Subscriber level followed by plugin interactions
• Review database content periodically for stored XSS indicators such as encoded script tags or JavaScript event handlers
• Use browser security headers monitoring to detect Content Security Policy violations that may indicate XSS attempts

How to Mitigate CVE-2026-1923

Immediate Actions Required

• Update the Social Rocket – Social Sharing Plugin to the latest patched version immediately
• Audit existing database content for signs of injected malicious scripts and sanitize any discovered payloads
• Review user accounts with Subscriber-level access and above for suspicious activity
• Consider temporarily disabling the plugin if an immediate update is not possible

Patch Information

The vulnerability has been addressed by the plugin maintainers. The security fix is documented in the WordPress Changeset Update. Users should update to version 1.3.4.3 or later through the WordPress admin dashboard or by downloading the latest version from the WordPress plugin repository.

Additional technical details and vulnerability analysis are available in the Wordfence Vulnerability Report.

Workarounds

• Implement a Web Application Firewall with XSS filtering rules as a defense-in-depth measure
• Restrict user registration and disable Subscriber-level account creation if not required for site functionality
• Apply Content Security Policy headers to limit script execution to trusted sources
• Temporarily deactivate the Social Rocket plugin until the update can be applied

# WordPress CLI command to update the plugin
wp plugin update social-rocket

# Verify the installed version after update
wp plugin get social-rocket --field=version

# If update is not immediately possible, deactivate the plugin
wp plugin deactivate social-rocket