CVE-2026-57782: Universal Clocks Auth Bypass Vulnerability

CVE-2026-57782 Overview

CVE-2026-57782 is a missing authorization vulnerability in the PressTigers Universal Clocks WordPress plugin. The flaw affects all versions from initial release through version 1.2.0. Attackers exploit incorrectly configured access control security levels to interact with plugin functionality that should require authentication or elevated permissions. The issue is categorized under CWE-862: Missing Authorization. The vulnerability is network-exploitable, requires no privileges, and needs no user interaction. Successful exploitation results in low-impact integrity loss without compromising confidentiality or availability.

Critical Impact
Unauthenticated attackers can invoke plugin actions that should be restricted, modifying data managed by the Universal Clocks plugin on affected WordPress sites.

Affected Products

PressTigers Universal Clocks WordPress plugin (universal-clocks)
All versions up to and including 1.2.0
WordPress sites with the plugin installed and activated

Discovery Timeline

2026-07-13 - CVE-2026-57782 published to NVD
2026-07-13 - Last updated in NVD database

Technical Details for CVE-2026-57782

Vulnerability Analysis

The Universal Clocks plugin exposes one or more actions that lack proper authorization checks. In WordPress plugins, authorization enforcement typically occurs through current_user_can() capability checks and nonce verification via check_admin_referer() or wp_verify_nonce(). When either mechanism is missing or incorrectly configured, endpoints registered through admin-ajax.php, the REST API, or admin-post.php become accessible to unintended users.

Because the plugin does not correctly gate sensitive functionality, an attacker can send crafted HTTP requests directly to the plugin endpoints. The Patchstack advisory classifies this as a broken access control issue affecting site configuration or plugin data managed through the vulnerable handlers. Refer to the Patchstack Vulnerability Report for the underlying research.

Root Cause

The root cause is a missing or misconfigured authorization check on plugin handlers. The plugin registers callbacks without validating whether the requester holds the required capability or without confirming a valid nonce. This design allows requests from unauthenticated sessions to reach code paths intended for administrators.

Attack Vector

An attacker sends HTTP requests directly to the exposed plugin endpoints over the network. No authentication, elevated privileges, or user interaction is required. The impact is limited to integrity of plugin-controlled data, consistent with the vulnerability's low integrity impact classification.

No verified public exploit code is available. The vulnerability mechanism is documented in the referenced Patchstack advisory.

Detection Methods for CVE-2026-57782

Indicators of Compromise

Unauthenticated POST requests to wp-admin/admin-ajax.php or plugin-registered REST routes targeting Universal Clocks actions
Unexpected modifications to Universal Clocks plugin settings or wp_options entries associated with the plugin
Requests to plugin endpoints originating from IP addresses without a valid administrator session cookie

Detection Strategies

Review web server access logs for HTTP requests to Universal Clocks plugin paths under /wp-content/plugins/universal-clocks/ and correlate with authenticated session state
Enable WordPress audit logging to capture settings changes, and alert on modifications made without a corresponding administrator login event
Compare current plugin configuration against a known-good baseline to detect drift caused by unauthorized changes

Monitoring Recommendations

Monitor admin-ajax.php requests carrying action parameters associated with the Universal Clocks plugin and flag those without a valid _wpnonce
Track anomalous spikes in requests to the plugin's REST or AJAX endpoints from a single source IP
Integrate WordPress audit logs into a centralized SIEM or data lake for correlation across the site fleet

How to Mitigate CVE-2026-57782

Immediate Actions Required

Identify all WordPress sites running the Universal Clocks plugin at version 1.2.0 or earlier
Update the plugin to a version released after 1.2.0 once the vendor publishes a fix, or deactivate the plugin until a patch is available
Restrict access to wp-admin/admin-ajax.php and plugin endpoints at the web application firewall where feasible
Rotate administrator credentials on any site where unauthorized configuration changes are observed

Patch Information

At the time of publication, the Patchstack Vulnerability Report lists the vulnerability as affecting versions up to and including 1.2.0. Site administrators should monitor the Universal Clocks plugin page for a fixed release and apply the update immediately once available.

Workarounds

Deactivate and remove the Universal Clocks plugin until a patched version is released
Deploy a WordPress WAF ruleset that blocks unauthenticated requests to plugin AJAX and REST endpoints
Enforce IP allow-listing for /wp-admin/ to reduce exposure of authenticated administrative surfaces

bash

# Example: block unauthenticated access to the plugin via nginx
location ~* /wp-content/plugins/universal-clocks/ {
    deny all;
    return 403;
}