CVE-2025-27296 Overview
CVE-2025-27296 is a missing authorization vulnerability in the WordPress plugin Auto Ad Inserter – Increase Google Adsense and Ad Manager Revenue (revenueflex-easy-ads). The flaw affects all versions from n/a through 1.5 and stems from incorrectly configured access control on plugin settings endpoints. Authenticated users with elevated privileges can modify plugin settings outside their intended authorization scope. The issue is tracked under CWE-862: Missing Authorization.
Critical Impact
Authenticated attackers can change plugin settings, potentially injecting ad code that affects site monetization, redirects revenue, or serves malicious advertising payloads to site visitors.
Affected Products
- WordPress plugin: Auto Ad Inserter – Increase Google Adsense and Ad Manager Revenue (revenueflex-easy-ads)
- All versions from n/a through 1.5
- WordPress sites using this plugin for ad management
Discovery Timeline
- 2025-02-24 - CVE-2025-27296 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-27296
Vulnerability Analysis
The vulnerability resides in the plugin's settings-handling logic. The plugin fails to verify whether the requesting user holds the appropriate capability before processing settings change requests. WordPress plugins are expected to call current_user_can() with a specific capability such as manage_options before applying configuration changes. The Auto Ad Inserter plugin does not enforce this check on the affected endpoint.
This category of flaw falls under broken access control and missing authorization. An attacker with low-tier authenticated access can issue crafted requests to plugin settings handlers and alter configuration values reserved for administrators. The attack is network-reachable and requires no user interaction.
Root Cause
The root cause is the absence of a capability or nonce verification step inside the settings update handler. Without current_user_can() enforcement, the handler treats any authenticated session as authorized. The Patchstack advisory categorizes the issue as a settings change vulnerability linked to incorrectly configured access control security levels.
Attack Vector
Exploitation occurs over the network against a WordPress instance running the vulnerable plugin. The attacker must hold an authenticated account on the target site. Once authenticated, the attacker submits a request to the plugin's admin-ajax or admin-post handler that processes settings updates. The handler accepts the request and writes attacker-controlled values into the WordPress options table.
Downstream impact includes replacing legitimate ad code with attacker-controlled JavaScript, redirecting Google AdSense identifiers, or disabling ad delivery entirely. Refer to the Patchstack advisory for further technical context.
Detection Methods for CVE-2025-27296
Indicators of Compromise
- Unexpected changes to plugin settings entries in the wp_options table referencing revenueflex-easy-ads or related option keys.
- Modified or replaced Google AdSense publisher IDs and ad slot identifiers within plugin configuration.
- Outbound script tags or third-party domains appearing in ad placement areas of rendered pages.
- POST requests to admin-ajax.php or plugin admin endpoints from low-privileged authenticated user accounts.
Detection Strategies
- Audit WordPress access logs for requests targeting revenueflex-easy-ads handlers originating from non-administrator accounts.
- Monitor the wp_options table for writes to plugin-specific option names and correlate timestamps with user session activity.
- Compare rendered ad markup against a known-good baseline to identify unauthorized script injection.
- Deploy file integrity monitoring against the plugin directory and WordPress core to surface tampering.
Monitoring Recommendations
- Forward WordPress audit logs and web server access logs to a centralized SIEM for correlation across user activity.
- Alert on settings modification events performed by users below the administrator role.
- Track plugin version inventory across managed WordPress instances to identify hosts still running version 1.5 or earlier.
How to Mitigate CVE-2025-27296
Immediate Actions Required
- Identify all WordPress instances running the revenueflex-easy-ads plugin at version 1.5 or earlier.
- Deactivate the plugin until a fixed release is available and verified.
- Review user accounts and revoke unnecessary authenticated access, especially shared or stale contributor accounts.
- Audit current plugin settings against a known-good configuration baseline and restore legitimate AdSense identifiers.
Patch Information
At the time of NVD publication, the advisory identifies the vulnerable range as n/a through <= 1.5. Administrators should consult the Patchstack vulnerability database entry for current patch status and apply the vendor-supplied update once published.
Workarounds
- Disable or remove the Auto Ad Inserter plugin until a patched release is verified in a staging environment.
- Restrict access to wp-admin and admin-ajax.php using web application firewall rules that block requests to plugin-specific actions from non-administrator sessions.
- Apply the principle of least privilege across WordPress roles and remove unused author, contributor, and editor accounts.
- Enforce multi-factor authentication on all WordPress accounts to limit the impact of credential compromise.
# Example: list installed plugins and versions across WordPress hosts using WP-CLI
wp plugin list --status=active --format=table
wp plugin deactivate revenueflex-easy-ads
wp plugin delete revenueflex-easy-ads
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
