CVE-2025-39522 Overview
CVE-2025-39522 is a missing authorization vulnerability in the Service2Client LLC Dynamic Post WordPress plugin. The flaw affects all versions up to and including 5.03. It stems from incorrectly configured access control security levels that fail to validate user permissions on sensitive plugin actions.
An authenticated attacker with low privileges can exploit the weakness over the network to modify plugin settings. The issue is classified under CWE-862: Missing Authorization.
Critical Impact
An authenticated low-privilege user can alter Dynamic Post plugin settings, undermining site integrity and availability without administrator consent.
Affected Products
- Service2Client LLC Dynamic Post plugin for WordPress
- All versions from initial release through 5.03
- WordPress sites with the dynamic-post plugin installed and active
Discovery Timeline
- 2025-04-16 - CVE-2025-39522 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-39522
Vulnerability Analysis
The Dynamic Post plugin exposes actions that change plugin configuration without enforcing an appropriate authorization check. WordPress plugins are expected to gate privileged operations with capability checks such as current_user_can('manage_options') and nonce verification through check_admin_referer() or wp_verify_nonce().
In Dynamic Post through version 5.03, these checks are absent or misconfigured on settings-change endpoints. Any authenticated user, including subscribers, can invoke the vulnerable handler and modify plugin state. The Patchstack advisory documents this as a settings-change flaw.
Root Cause
The root cause is a broken access control pattern [CWE-862]. The plugin registers AJAX or admin-post handlers that execute privileged logic but do not verify the caller's role or capability. Access control is treated as implicit rather than enforced at the handler entry point.
Attack Vector
Exploitation requires network access to the WordPress site and a valid authenticated session at any privilege level. The attacker sends a crafted HTTP POST request to the vulnerable plugin endpoint with parameters that overwrite plugin settings. No user interaction from an administrator is required. Successful exploitation affects integrity and availability of the plugin's configuration and any site behavior driven by it.
No public proof-of-concept exploit code is available at the time of publication. Refer to the Patchstack Vulnerability Report for further technical detail.
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Stop Identity AttacksDetection Methods for CVE-2025-39522
Indicators of Compromise
- Unexpected changes to Dynamic Post plugin settings within the WordPress admin interface.
- Requests to wp-admin/admin-ajax.php or wp-admin/admin-post.php referencing Dynamic Post actions originating from low-privileged accounts.
- New or modified content, shortcodes, or feed sources introduced by the plugin without administrator activity.
Detection Strategies
- Audit WordPress activity logs for settings changes performed by users without the manage_options capability.
- Compare current Dynamic Post configuration against a known-good baseline stored outside the database.
- Review web server access logs for POST requests to plugin action endpoints correlated with subscriber-level session cookies.
Monitoring Recommendations
- Enable a WordPress audit logging plugin to record user actions, capability checks, and options table changes.
- Forward WordPress and web server logs to a centralized SIEM for correlation and alerting on privileged action attempts by low-privilege accounts.
- Alert on high-volume authenticated POST traffic to admin-ajax.php from single accounts, which can indicate settings tampering.
How to Mitigate CVE-2025-39522
Immediate Actions Required
- Inventory all WordPress sites and identify installations of the Dynamic Post plugin at version 5.03 or earlier.
- Deactivate the plugin on affected sites until a vendor patch is applied.
- Review and restore Dynamic Post settings from a trusted backup if tampering is suspected.
- Rotate credentials for any low-privilege accounts that may have been abused.
Patch Information
At the time of NVD publication, no fixed version is listed for the Dynamic Post plugin; the advisory states the issue affects versions up to and including 5.03. Monitor the Patchstack advisory and the WordPress plugin repository for a patched release, and apply it as soon as it becomes available.
Workarounds
- Deactivate and remove the Dynamic Post plugin until a fixed version is published.
- Restrict access to wp-admin/admin-ajax.php and wp-admin/admin-post.php from untrusted networks with a web application firewall (WAF).
- Enforce least privilege by removing unnecessary subscriber or contributor accounts and requiring strong authentication for all users.
- Deploy virtual patching rules through a WAF or WordPress security plugin that block unauthenticated or low-privilege requests to the Dynamic Post action handlers.
# Configuration example: disable the plugin via WP-CLI on affected hosts
wp plugin deactivate dynamic-post --all
wp plugin status dynamic-post
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
