CVE-2024-32705: ARForms Auth Bypass Vulnerability

CVE-2024-32705 Overview

CVE-2024-32705 is a Missing Authorization vulnerability [CWE-862] in the ARForms WordPress plugin developed by reputeinfosystems. The flaw affects all versions of ARForms up to and including 6.4. Authenticated users with low privileges, such as subscribers, can activate or deactivate arbitrary plugins on the WordPress site. This capability enables privilege escalation paths by disabling security plugins or enabling vulnerable ones. The vulnerability is exploitable over the network with low attack complexity.

Critical Impact

Authenticated subscriber-level users can activate or deactivate arbitrary WordPress plugins, undermining site security posture and enabling further compromise.

Affected Products

• ARForms WordPress plugin versions through 6.4
• reputeinfosystems ARForms (all versions n/a through <= 6.4)
• WordPress sites with vulnerable ARForms installations

Discovery Timeline

• 2024-06-09 - CVE-2024-32705 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-32705

Vulnerability Analysis

The ARForms plugin exposes plugin activation and deactivation functionality through AJAX endpoints without enforcing appropriate capability checks. Authenticated users with only subscriber-level privileges can invoke these endpoints to change the activation state of any installed plugin. This breaks the WordPress role separation model, where plugin management is reserved for administrators. Attackers can leverage this to disable security-focused plugins such as web application firewalls, login protections, or activity monitors. Alternatively, they can activate installed but disabled plugins that contain known vulnerabilities to establish a foothold for further attacks.

Root Cause

The root cause is a missing authorization check [CWE-862] in the plugin's request handlers responsible for activating and deactivating plugins. The code relies on authentication alone and does not verify that the requesting user holds the activate_plugins capability. WordPress requires developers to gate privileged actions with current_user_can() checks, which ARForms omits in the affected handlers.

Attack Vector

Exploitation requires only a low-privileged authenticated account, which any site that allows user registration provides by default. The attacker sends a crafted request to the vulnerable AJAX endpoint specifying the target plugin slug and desired action. Because the endpoint does not validate capabilities, the request succeeds and the plugin state changes. Chaining this with a known-vulnerable but inactive plugin can lead to remote code execution or full site takeover.

No verified public proof-of-concept code is available. See the Patchstack Vulnerability Report for additional technical details.

Detection Methods for CVE-2024-32705

Indicators of Compromise

• Unexpected entries in the WordPress active_plugins option or sudden activation/deactivation events in the audit log.
• AJAX requests to admin-ajax.php originating from subscriber accounts referencing ARForms actions and plugin file paths.
• Security plugins (firewall, login limiter, activity log) appearing in a disabled state without an administrator action.

Detection Strategies

• Monitor WordPress option changes to active_plugins and correlate with the authenticated user identity performing the change.
• Alert on HTTP POST requests to ARForms AJAX handlers from users whose role is not administrator.
• Compare a baseline of active plugins against the current state on a scheduled basis and flag deltas.

Monitoring Recommendations

• Enable a WordPress activity log plugin that records plugin activation, deactivation, and user role events.
• Forward web server access logs and WordPress audit logs to a centralized SIEM for correlation and long-term retention.
• Track newly registered subscriber accounts followed by requests targeting plugin management endpoints.

How to Mitigate CVE-2024-32705

Immediate Actions Required

• Update the ARForms plugin to a version later than 6.4 as soon as a fixed release is available from reputeinfosystems.
• Audit the current list of active plugins and disable any that were activated without authorization.
• Review subscriber and low-privilege accounts and remove any that are unrecognized or inactive.
• Temporarily disable open user registration on sites where it is not required.

Patch Information

Refer to the Patchstack Vulnerability Details page for the current patch status and upgrade guidance. Administrators should apply the vendor-supplied update that introduces proper current_user_can('activate_plugins') authorization checks on the affected handlers.

Workarounds

• Deactivate the ARForms plugin until a patched version is installed if forms functionality is not business-critical.
• Restrict access to /wp-admin/admin-ajax.php for authenticated non-administrator roles using a web application firewall rule targeting ARForms action parameters.
• Use a WordPress security plugin to enforce role-based restrictions on plugin management endpoints.

# Example WAF rule concept: block subscriber-level requests to ARForms AJAX actions
# Adapt syntax to your WAF (ModSecurity, Cloudflare, etc.)
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1032705,msg:'Block ARForms plugin activation abuse'"
  SecRule ARGS:action "@rx ^arf_" \
    "chain"
    SecRule REQUEST_HEADERS:Cookie "@rx wordpress_logged_in_" "t:none"