calj CalJ Shabbat Times Plugin up to 1.5 on WordPress Setting calj.php is_admin authorization

Summaryinfo

A vulnerability was found in calj CalJ Shabbat Times Plugin up to 1.5 on WordPress. It has been rated as critical. This impacts the function is_admin of the file calj.php of the component Setting Handler. Performing a manipulation results in authorization. This vulnerability is known as CVE-2026-4117. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in calj CalJ Shabbat Times Plugin up to 1.5 on WordPress. This affects the function is_admin of the file calj.php of the component Setting Handler. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The CalJ plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.5. This is due to a missing capability check in the CalJSettingsPage class constructor, which processes the 'save-obtained-key' operation directly from POST data without verifying that the requesting user has the 'manage_options' capability, and without any nonce verification. The plugin bootstrap file (calj.php) instantiates CalJSettingsPage whenever is_admin() returns true, which is the case for any authenticated user making requests to wp-admin URLs (including admin-ajax.php). This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the plugin's API key setting and clear the Shabbat cache, effectively taking control of the plugin's API integration.

The weakness was published by Nabil Irawan. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-4117 since 03/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

By approaching the search of inurl:calj.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.5 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• calj

Name

• CalJ Shabbat Times Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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