CVE-2025-22641 Overview
CVE-2025-22641 is a stored Cross-Site Scripting (XSS) vulnerability in the Prem Tiwari FM Notification Bar WordPress plugin. The flaw stems from improper neutralization of input during web page generation [CWE-79]. It affects all plugin versions from unspecified initial releases through 1.0.4.
An authenticated attacker with high privileges can inject persistent JavaScript payloads that execute in the browsers of users who load affected pages. Because the vulnerability crosses the security scope boundary, injected scripts can impact visitors beyond the vulnerable component.
Critical Impact
Attackers can persist malicious scripts inside notification bar content, leading to session theft, credential harvesting, and redirection of site visitors.
Affected Products
- Prem Tiwari FM Notification Bar plugin for WordPress
- Plugin versions from initial release through 1.0.4
- WordPress sites running the fm-notification-bar component
Discovery Timeline
- 2025-02-04 - CVE-2025-22641 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-22641
Vulnerability Analysis
The vulnerability is a stored XSS flaw in the FM Notification Bar plugin. User-supplied input processed by the plugin is written to persistent storage and later rendered in HTML output without adequate sanitization or output encoding.
Exploitation requires an authenticated actor with high privileges and some form of user interaction to trigger the payload. The scope change indicates that injected code executes in a context different from the vulnerable component, which broadens the impact to unauthenticated site visitors.
Successful exploitation yields limited but material effects on confidentiality, integrity, and availability. Typical outcomes include cookie exfiltration, forced administrative actions through the victim's session, and injection of drive-by redirects.
Root Cause
The plugin fails to sanitize input written to notification bar fields and does not encode that data on output. When an administrator or privileged user saves crafted content, the plugin persists raw markup. Rendering routines then emit the payload directly into the DOM, allowing <script> execution.
Attack Vector
The attack is delivered over the network through the WordPress admin interface. An attacker who controls a high-privilege account submits crafted JavaScript through plugin configuration fields. The payload persists in the database and fires whenever a browser loads a page containing the notification bar.
No verified proof-of-concept code is published. Refer to the Patchstack XSS Vulnerability Report for advisory details.
Detection Methods for CVE-2025-22641
Indicators of Compromise
- Unexpected <script>, onerror, or onload markup stored in wp_options or plugin-specific tables tied to fm-notification-bar.
- Outbound requests from site visitors to attacker-controlled domains not referenced elsewhere on the site.
- Administrator sessions performing actions outside normal working hours, consistent with hijacked cookies.
Detection Strategies
- Audit the WordPress database for HTML or JavaScript tokens in FM Notification Bar configuration entries.
- Deploy Content Security Policy (CSP) reporting to surface script executions that violate the site's allowlist.
- Monitor web server access logs for POST requests to plugin admin endpoints followed by anomalous script fetches on public pages.
Monitoring Recommendations
- Alert on modifications to plugin settings performed by administrator accounts, especially outside change windows.
- Track browser-side JavaScript errors and CSP violations from site visitors as early indicators of injected content.
- Correlate WordPress audit logs with edge WAF telemetry to identify authenticated abuse of vulnerable plugin endpoints.
How to Mitigate CVE-2025-22641
Immediate Actions Required
- Deactivate and remove the FM Notification Bar plugin if a patched release is not available.
- Rotate WordPress administrator credentials and invalidate active sessions to eliminate hijacked cookies.
- Review database entries associated with the plugin and remove any persisted script content.
Patch Information
No fixed version is identified in the available advisory data. The vulnerability affects the plugin through 1.0.4. Monitor the Patchstack advisory and the plugin's WordPress.org listing for a security release. If no patch is published, remove the plugin.
Workarounds
- Restrict access to WordPress administrative roles and enforce multi-factor authentication for all privileged accounts.
- Deploy a Web Application Firewall (WAF) rule that blocks HTML and JavaScript tokens in POST requests to the plugin's configuration endpoints.
- Implement a strict Content Security Policy that disallows inline scripts and unapproved external script origins.
- Replace the plugin with an actively maintained notification bar alternative that receives timely security updates.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
