CVE-2023-1868 in YourChannel Plugin
Summary
by MITRE • 04/05/2023
The YourChannel plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check when clearing the plugin cache via the yrc_clear_cache GET parameter in versions up to, and including, 1.2.3. This makes it possible for unauthenticated attackers to clear the plugin's cache.
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Analysis
by VulDB Data Team • 04/22/2023
The vulnerability identified as CVE-2023-1868 affects the YourChannel plugin for WordPress, specifically targeting versions up to and including 1.2.3. This represents a critical security flaw that undermines the integrity of the plugin's cache management functionality. The issue stems from a fundamental lack of access control verification within the plugin's codebase, creating an exploitable condition that allows unauthorized entities to manipulate core system components. The vulnerability manifests through the yrc_clear_cache GET parameter, which should require proper authentication and authorization but instead operates without adequate capability checks.
The technical flaw resides in the plugin's implementation of cache clearing functionality where the system fails to validate user permissions before executing cache clearance operations. This missing capability check creates a direct path for unauthenticated attackers to exploit the vulnerability by simply making a GET request to the yrc_clear_cache endpoint. The absence of proper authentication mechanisms means that any attacker capable of accessing the plugin's endpoint can perform cache clearing operations, potentially leading to service disruption or data integrity issues. This weakness aligns with CWE-284, which describes inadequate access control mechanisms that allow unauthorized users to perform privileged operations.
From an operational impact perspective, this vulnerability poses significant risks to WordPress installations using the affected plugin version. The ability to clear plugin cache without authentication can result in service degradation, loss of cached data, and potential disruption of plugin functionality. Cache clearing operations often contain critical data that supports plugin operations, and unauthorized manipulation can lead to incomplete data restoration or loss of important operational information. The vulnerability particularly affects websites where the plugin manages channel content, as cache invalidation can remove essential data needed for proper plugin operation, potentially causing service interruptions for legitimate users.
The attack surface for this vulnerability extends beyond simple cache manipulation, as it represents a broader class of access control failures that can be leveraged for more sophisticated attacks. Security researchers and threat actors can exploit this condition to disrupt service availability or potentially create conditions for further exploitation. The vulnerability's impact is amplified in environments where the plugin's cache contains sensitive operational data or where cache clearing operations might trigger cascading failures in related systems. Organizations should consider this vulnerability within the broader context of their security posture, particularly regarding the principle of least privilege and proper access control implementations.
Mitigation strategies for CVE-2023-1868 should prioritize immediate plugin updates to versions that address the missing capability check. System administrators must ensure that all WordPress installations using the YourChannel plugin are updated to patched versions that implement proper authentication mechanisms for cache clearing operations. Additionally, network-level protections such as web application firewalls should be configured to monitor and restrict access to potentially vulnerable endpoints. Organizations should also implement regular security assessments of their WordPress plugins to identify and remediate similar access control vulnerabilities. The remediation process should include validating that the updated plugin properly enforces access controls and that no other similar conditions exist within the plugin's codebase. Security monitoring should be enhanced to detect suspicious cache clearing activities that might indicate exploitation attempts, as this vulnerability can be used as a precursor to more serious attacks within the WordPress ecosystem.