CVE-2025-24643: WPGuppy Auth Bypass Vulnerability

CVE-2025-24643 Overview

CVE-2025-24643 is a Missing Authorization vulnerability in the AmentoTech WPGuppy wpguppy-lite WordPress plugin. The flaw affects all versions up to and including 1.1.0. Attackers can exploit incorrectly configured access control security levels to interact with plugin functionality that should be restricted to authorized users.

The vulnerability is network-exploitable, requires no privileges, and does not require user interaction. The issue is tracked under CWE-862: Missing Authorization.

Critical Impact
Unauthenticated attackers can reach protected plugin functionality due to broken authorization checks, resulting in limited integrity and availability impact on affected WordPress sites.

Affected Products

AmentoTech Private Limited WPGuppy wpguppy-lite
All versions from unspecified initial release through 1.1.0
WordPress installations running the affected plugin

Discovery Timeline

2025-02-03 - CVE-2025-24643 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-24643

Vulnerability Analysis

The WPGuppy wpguppy-lite plugin fails to enforce proper authorization checks on one or more of its endpoints. WordPress plugins typically expose functionality through admin-ajax handlers, REST API routes, or admin-post actions. Each of these entry points must independently verify that the requesting user has the appropriate capability before executing sensitive operations.

In wpguppy-lite versions up to 1.1.0, the access control implementation does not correctly validate the caller's permissions. This allows requests from users with lower privilege levels — or unauthenticated actors, depending on the affected endpoint — to reach functionality intended for authorized roles only.

The CVSS impact vector indicates no confidentiality impact but low integrity and low availability impact. This suggests the exposed functionality allows modifying or disrupting plugin data or state rather than exfiltrating sensitive records. The EPSS score at time of publication is approximately 0.39%.

Root Cause

The root cause is a missing or insufficient capability check (CWE-862). Handler functions inside the plugin either omit calls to current_user_can(), rely on client-supplied trust signals, or apply nonces without a corresponding role check. Nonces alone verify request origin, not authorization.

Attack Vector

An attacker sends a crafted HTTP request to the vulnerable plugin endpoint over the network. Because no valid authorization is required, the request reaches the underlying handler and executes privileged logic. No user interaction is needed on the victim side.

No verified public exploit code is available. Technical details are described in the Patchstack advisory.

Detection Methods for CVE-2025-24643

Indicators of Compromise

Unexpected POST or GET requests to /wp-admin/admin-ajax.php referencing WPGuppy actions from unauthenticated sessions
Requests to WPGuppy REST API routes originating from IPs without prior authenticated session cookies
Unexplained modifications to plugin-managed data, messages, or configuration

Detection Strategies

Inventory WordPress installations and identify sites running wpguppy-lite at version 1.1.0 or earlier
Review web server access logs for requests targeting WPGuppy endpoints from anonymous clients
Correlate WordPress audit logs with authentication events to detect actions performed without a valid privileged session

Monitoring Recommendations

Enable verbose logging on the WordPress instance and forward logs to a centralized SIEM or data lake for correlation
Alert on high-volume or anomalous requests to plugin-specific AJAX or REST endpoints
Monitor for changes to plugin database tables and configuration options outside normal administrative workflows

How to Mitigate CVE-2025-24643

Immediate Actions Required

Identify all WordPress sites running the wpguppy-lite plugin and confirm the installed version
Update the plugin to a fixed release once the vendor publishes a patched version beyond 1.1.0
If no patched version is available, deactivate and remove the plugin until a fix is released

Patch Information

At the time of publication, the vulnerability affects wpguppy-lite versions up to and including 1.1.0. Consult the Patchstack advisory and the AmentoTech vendor channels for the current fixed version and upgrade guidance.

Workarounds

Restrict access to WordPress administrative and AJAX endpoints using a web application firewall (WAF) rule set
Apply virtual patching rules that block unauthenticated requests to WPGuppy-specific action parameters
Limit plugin exposure by placing the WordPress site behind authentication proxies or IP allowlists for administrative paths

bash

# Example WAF rule concept to block anonymous access to plugin AJAX actions
# (adapt syntax to your WAF: ModSecurity, Cloudflare, AWS WAF, etc.)
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1002401,msg:'Block unauth WPGuppy action'"
  SecRule ARGS:action "@rx ^wpguppy_" \
    "chain"
    SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"