CVE-2025-12521 Overview
CVE-2025-12521 is a sensitive information exposure vulnerability affecting the Analytify Pro plugin for WordPress in all versions up to and including 7.0.3. The flaw resides in the Analytify Tag HTML details rendered by the plugin, which leak usernames into page source code. Unauthenticated attackers can extract these usernames by inspecting the HTML output of affected pages. The issue is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Wordfence notes that CVE identifiers are not typically assigned for username exposure, but the vendor requested this be tracked as a vulnerability.
Critical Impact
Unauthenticated remote attackers can harvest WordPress usernames from the rendered HTML of sites running Analytify Pro <= 7.0.3, enabling credential-stuffing and targeted brute-force attacks against administrator accounts.
Affected Products
- Analytify Pro plugin for WordPress, all versions up to and including 7.0.3
- WordPress sites using the Analytify Tag HTML output feature
- Deployments exposing plugin-rendered pages to unauthenticated visitors
Discovery Timeline
- 2025-10-31 - CVE-2025-12521 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-12521
Vulnerability Analysis
The Analytify Pro plugin injects tracking-related metadata into the HTML output of WordPress pages. Within this Analytify Tag HTML block, the plugin embeds contributor or author usernames without restricting the field to non-sensitive identifiers. Any unauthenticated visitor who views the page source can read these usernames directly from the DOM.
WordPress treats usernames as semi-secret because they act as one of two factors in default login authentication. Leaking a valid username reduces an attacker's work to guessing only the password. The vulnerability has network attack vector, low complexity, and requires no privileges or user interaction, resulting in confidentiality impact without integrity or availability effects. The EPSS probability is 0.249%.
Root Cause
The root cause is improper output filtering in the Analytify Tag rendering logic. The plugin serializes user objects into HTML attributes or inline script data and includes the user_login field rather than a public-facing display name or opaque identifier. No access control gates this output, so unauthenticated requests receive the same response as authenticated ones.
Attack Vector
An attacker sends an unauthenticated HTTP GET request to any public page on a target WordPress site running Analytify Pro <= 7.0.3. The attacker parses the returned HTML, locates the Analytify Tag block, and extracts usernames embedded in the markup. These usernames feed downstream attacks such as password spraying against wp-login.php or the XML-RPC endpoint, and phishing campaigns targeting the enumerated accounts. Consult the Wordfence Vulnerability Report for advisory details.
Detection Methods for CVE-2025-12521
Indicators of Compromise
- Unauthenticated HTTP GET requests from a single source enumerating multiple pages within a short time window
- Subsequent authentication attempts against wp-login.php or xmlrpc.php using usernames that appear in Analytify Tag HTML output
- User-Agent strings tied to scraping tools or WordPress enumeration frameworks such as wpscan
Detection Strategies
- Inspect page source for Analytify-generated HTML blocks and confirm whether user_login values are present rather than display names
- Correlate web server access logs with authentication logs to identify username reuse between page scrapes and login attempts
- Deploy a WordPress plugin scanner or vulnerability management tool that flags Analytify Pro versions <= 7.0.3
Monitoring Recommendations
- Alert on repeated failed logins targeting the same usernames from distinct IP addresses, a signature of credential stuffing following enumeration
- Monitor for anomalous crawling patterns hitting author archive URLs, /?author=n endpoints, and pages containing Analytify tags
- Track outbound requests from monitoring or SEO tools that may inadvertently log leaked usernames in third-party dashboards
How to Mitigate CVE-2025-12521
Immediate Actions Required
- Update Analytify Pro to a version later than 7.0.3 once the vendor releases a fixed release
- Audit all WordPress accounts with elevated privileges and enforce strong, unique passwords
- Enable multi-factor authentication for administrator, editor, and author accounts to blunt post-enumeration attacks
Patch Information
The vendor has been notified and tracks remediation on the Analytify site. No fixed version is listed in the current NVD record. Administrators should subscribe to Analytify release notifications and apply the security update immediately once published.
Workarounds
- Temporarily deactivate the Analytify Pro plugin until a patched version is available
- Configure the WordPress rest_endpoints filter and block /?author=n redirects to reduce parallel username enumeration paths
- Deploy a web application firewall rule that strips or redacts Analytify Tag HTML blocks containing user_login values before responses are served to unauthenticated clients
- Rename default administrator usernames and avoid using account login names as public display names
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
