CVE-2025-58658 Overview
CVE-2025-58658 is a stored Cross-Site Scripting (XSS) vulnerability in the Proof Factor LLC proof-factor-social-proof-notifications WordPress plugin. The flaw affects all versions up to and including 1.0.5. It stems from improper neutralization of user-supplied input during web page generation, categorized under [CWE-79].
An authenticated attacker with high privileges can inject malicious scripts that persist in the plugin's stored data. The payload executes in the browsers of users who view the affected page, enabling session theft, forced actions, or redirection.
Critical Impact
Successful exploitation allows stored JavaScript payloads to run in victim browsers with the scope of the vulnerable WordPress site, impacting confidentiality, integrity, and availability.
Affected Products
- Proof Factor LLC Proof Factor – Social Proof Notifications (WordPress plugin)
- All versions from initial release through 1.0.5
- WordPress installations with the plugin activated
Discovery Timeline
- 2025-09-22 - CVE-2025-58658 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-58658
Vulnerability Analysis
The plugin fails to sanitize or escape input supplied through administrative interfaces before rendering it in the generated web page. An attacker with elevated privileges (such as an administrator or editor role) can submit input containing HTML or JavaScript. The input is stored server-side and rendered back to any user visiting a page that displays the notification content.
Because exploitation requires a scope change and user interaction, the payload can execute in a context beyond the vulnerable component. This enables session hijacking, credential theft via injected forms, or delivery of secondary payloads to site visitors.
Root Cause
The root cause is missing output encoding and input validation in the plugin's notification content handlers. WordPress provides wp_kses, esc_html, and esc_attr helpers for context-aware escaping, but the vulnerable code paths write attacker-controlled strings directly into the rendered HTML. This allows <script> tags and event-handler attributes to survive intact through storage and rendering.
Attack Vector
The attack begins when an authenticated user with sufficient privileges submits a crafted notification payload through a plugin form or settings page. The payload is persisted in the WordPress database and rendered whenever the notification is displayed. A separate victim must load a page containing the stored payload for execution to occur. Because the scope changes to the victim's browser session, the injected script inherits access to cookies, tokens, and Document Object Model (DOM) state for that origin.
Refer to the Patchstack XSS Vulnerability Advisory for technical details.
Detection Methods for CVE-2025-58658
Indicators of Compromise
- Notification records in the WordPress database containing <script>, onerror=, onload=, or javascript: sequences
- Unexpected outbound requests from browser sessions of authenticated site visitors to attacker-controlled domains
- New or modified administrator accounts created shortly after an authenticated user visits a page rendering plugin content
- Anomalous edits to wp_options or plugin-specific tables associated with Proof Factor notifications
Detection Strategies
- Query the WordPress database for plugin-managed rows containing HTML tag characters or JavaScript event handler substrings
- Deploy a Web Application Firewall (WAF) rule that inspects POST parameters targeting plugin admin endpoints for script markup
- Enable a Content Security Policy (CSP) that reports inline script violations to a monitored endpoint
Monitoring Recommendations
- Log and review all plugin configuration changes performed by administrator and editor accounts
- Monitor browser-side errors and CSP violation reports for pages that render plugin notifications
- Alert on newly created privileged WordPress users following plugin content modifications
How to Mitigate CVE-2025-58658
Immediate Actions Required
- Deactivate the Proof Factor – Social Proof Notifications plugin until a fixed release is confirmed available
- Audit stored notification content for injected HTML or JavaScript and remove malicious entries
- Rotate credentials and session tokens for privileged WordPress accounts that may have viewed a compromised page
- Restrict administrative access to trusted IP ranges via server or WAF rules
Patch Information
At the time of publication, no fixed version has been listed in the NVD entry. Verify current status through the Patchstack XSS Vulnerability Advisory and apply any vendor update above version 1.0.5 as soon as it is released.
Workarounds
- Remove the plugin entirely and use an alternative social-proof notification solution
- Enforce least-privilege role assignments so fewer accounts can submit notification content
- Deploy a strict Content Security Policy that disallows inline scripts and untrusted script sources
- Add WAF signatures that block HTML tag characters in requests to the plugin's admin-ajax and REST endpoints
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
