CVE-2023-23684 in WPGraphQL Plugin
Summary
by MITRE • 11/13/2023
Server-Side Request Forgery (SSRF) vulnerability in WPGraphQL.This issue affects WPGraphQL: from n/a through 1.14.5.
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Analysis
by VulDB Data Team • 11/13/2023
Server-side request forgery vulnerabilities represent a critical class of security flaws that allow attackers to manipulate server-side requests through manipulated input parameters. In the context of WPGraphQL, this vulnerability specifically targets the GraphQL API endpoint implementation within WordPress environments where the WPGraphQL plugin is installed. The flaw enables malicious actors to craft requests that cause the server to make unintended HTTP requests to internal or external systems, effectively bypassing normal access controls and potentially exposing sensitive information or services.
The technical mechanism behind this SSRF vulnerability in WPGraphQL stems from inadequate input validation and sanitization within the plugin's request handling logic. When users submit GraphQL queries through the API endpoint, the system fails to properly validate or sanitize parameters that could be interpreted as URLs or network addresses. This oversight creates an attack surface where crafted payloads can manipulate the underlying HTTP client libraries to initiate requests to arbitrary destinations. The vulnerability affects all versions of WPGraphQL from the initial release through version 1.14.5, indicating a prolonged exposure window during which malicious actors could exploit this weakness.
The operational impact of this vulnerability extends beyond simple data exfiltration and encompasses significant risks to network infrastructure security. Attackers can leverage SSRF to probe internal network services that are typically isolated from external access, potentially discovering running services, vulnerable applications, or sensitive system information. The attack surface is particularly concerning in WordPress environments where the plugin may be hosted on servers with access to internal resources such as databases, administrative interfaces, or other backend services. This capability enables attackers to perform reconnaissance activities and potentially escalate their privileges within the compromised environment.
From a threat modeling perspective, this vulnerability aligns with CWE-918, which specifically addresses server-side request forgery conditions where untrusted input is used to construct HTTP requests. The ATT&CK framework categorizes such vulnerabilities under T1566, specifically targeting the exploitation of remote services through server-side request forgery techniques. Security professionals should note that this vulnerability may be particularly dangerous when combined with other weaknesses in the WordPress ecosystem, as it provides attackers with an effective means to bypass traditional network segmentation controls and access internal resources that would normally be protected.
Mitigation strategies for this SSRF vulnerability require immediate attention through version updates to WPGraphQL 1.14.6 or later, which contains the necessary patches to address the input validation flaws. Organizations should also implement network-level restrictions such as firewall rules that prevent outbound connections from WordPress servers to internal services, particularly those commonly targeted by SSRF attacks like AWS metadata endpoints, internal DNS servers, or database ports. Additionally, implementing proper input sanitization at multiple layers including API gateways, reverse proxies, and application-level filters provides defense-in-depth protection. Security monitoring should include detection of unusual outbound network requests from WordPress instances, particularly those targeting non-standard ports or internal IP ranges that would not normally be accessed by legitimate API operations.