EUVD-2026-39689
GHSA-h3w6-j9vx-xh22
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
PR:L reflects mandatory subscriber authentication; S:C and C:L/I:L reflect SSRF reaching internal network resources beyond the plugin boundary; A:N as no availability impact is described.
Primary rating from Vendor (patchstack).
CVSS VectorVendor: patchstack
Lifecycle Timeline
1DescriptionCVE.org
Subscriber Server Side Request Forgery (SSRF) in utm.codes <= 1.9.0 versions.
AnalysisAI
Server-Side Request Forgery in the utm.codes WordPress plugin (versions ≤ 1.9.0) enables authenticated subscribers to induce the web server to issue arbitrary outbound HTTP requests, with the vulnerability scope extending beyond the plugin itself to potentially reachable internal network resources. The CVSS Scope:Changed rating reflects that a successful exploit can pivot the server's network identity to probe internal services, cloud metadata endpoints, or intranet hosts inaccessible to the attacker directly. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis; however, the low attack complexity and subscriber-level privilege bar make this exploitable by any registered WordPress user on affected installations.
Technical ContextAI
CWE-918 (Server-Side Request Forgery) arises when an application fetches a remote resource based on user-controlled input without enforcing an allowlist of permitted destinations. The utm.codes plugin is a WordPress tool designed to generate and manage UTM-tagged links for marketing campaign tracking. Its URL-handling functionality likely accepts subscriber-supplied URLs and performs server-side HTTP fetches without adequate destination validation. The CVSS vector AV:N/AC:L indicates the flaw is remotely exploitable with no special conditions, and S:C (Scope Changed) signals that the WordPress application boundary is crossed - the vulnerable component (the plugin) causes requests to be issued by the underlying web server process, reaching systems that share the server's network trust zone. The affected CPE is the utm.codes WordPress plugin at or below version 1.9.0, as reported by Patchstack (EUVD-2026-39689).
RemediationAI
Update the utm.codes WordPress plugin to a version above 1.9.0 if a patched release has been published by the vendor; consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/utm-dot-codes/vulnerability/wordpress-utm-codes-plugin-1-9-0-server-side-request-forgery-ssrf-vulnerability for the confirmed fix version, as no exact patched release number was available in the provided data (patch status: patch available per vendor advisory via Patchstack, but released fix version not independently confirmed from input). If immediate patching is not possible, restrict WordPress subscriber registration to trusted users only, or remove the subscriber role's ability to interact with utm.codes URL submission features. As a compensating control for cloud-hosted deployments, enforce IMDSv2 (AWS) or equivalent metadata service hardening to prevent SSRF-based credential theft, noting this does not remediate the vulnerability but limits blast radius. Blocking outbound HTTP from the web server process via egress firewall rules to RFC-1918 and link-local ranges (169.254.0.0/16) will prevent internal resource access while allowing legitimate external UTM URL fetches, though this may interfere with the plugin's intended functionality.
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External POC / Exploit Code
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