CVE-2026-4117 CalJ <= 1.5 - Authenticated (Subscriber+) Arbitrary Settings Modification via 'save-obtained-key' Action
Authenticated subscribers can modify plugin API settings and clear caches due to missing capability checks in the CalJ WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4117?
CVE-2026-4117 is a medium-severity missing authorization vulnerability in CalJ Shabbat Times, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-4117?
How do I fix CVE-2026-4117?
No fix has been published for CVE-2026-4117 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4117 being exploited?
There is no known exploitation of CVE-2026-4117 in the wild and no public exploit code.
Sources
Also known as GHSA-5mhq-hh7f-vmww.