EUVD-2026-39743
GHSA-49ff-frjv-g5x5
Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Subscriber account (PR:L) required; AC:H reflects specific trigger conditions; Scope:Changed and C:L/I:L capture internal service reachability without direct system compromise.
Primary rating from Vendor (patchstack).
CVSS VectorVendor: patchstack
Lifecycle Timeline
1DescriptionCVE.org
Subscriber Server Side Request Forgery (SSRF) in Kirki <= 6.0.11 versions.
AnalysisAI
Server-Side Request Forgery in the Kirki WordPress customizer framework plugin (versions up to and including 6.0.11) allows authenticated subscriber-level users to induce the server to issue arbitrary HTTP requests to internal or external network destinations. The Scope:Changed CVSS designation confirms the exploit can pivot beyond the WordPress application itself to reach internal infrastructure. No public exploit code or active exploitation via CISA KEV has been identified at time of analysis, but the subscriber-level privilege requirement lowers the bar significantly for sites permitting open user registration.
Technical ContextAI
CWE-918 (Server-Side Request Forgery) arises when server-side code accepts attacker-controlled URLs or endpoints and makes outbound HTTP requests without sufficient validation. In the WordPress ecosystem, the Kirki plugin provides a feature-rich Customizer API toolkit used extensively by theme developers to expose configuration options. The vulnerable code path is accessible to users holding the 'subscriber' role - the lowest authenticated WordPress role - indicating the SSRF trigger is exposed in a feature that does not enforce higher capability checks. The CVSS Scope:Changed flag (S:C) is architecturally significant: successful exploitation allows the WordPress server to act as a proxy to reach internal services (e.g., cloud metadata endpoints, internal APIs, or RFC-1918 hosts) that are otherwise unreachable by the attacker directly. The CPE data from EUVD identifies the affected range as Kirki n/a ≤ 6.0.11, covering all published releases through that version.
RemediationAI
Upstream fix availability is not independently confirmed from the available data - the Patchstack reference at https://patchstack.com/database/wordpress/plugin/kirki/vulnerability/wordpress-kirki-plugin-6-0-11-server-side-request-forgery-ssrf-vulnerability should be consulted for the latest patch release and confirmed fixed version. WordPress administrators should check the plugin's official repository for an updated release beyond 6.0.11 and apply it immediately. Until a patch is confirmed, practical compensating controls include: disabling open user registration to prevent untrusted subscribers from existing on the site (Settings → General → uncheck 'Anyone can register'), which eliminates the PR:L attack surface entirely; deploying an egress firewall rule on the WordPress server host to block outbound HTTP/HTTPS connections to RFC-1918 ranges and cloud metadata endpoints (e.g., 169.254.169.254) to neutralize lateral reach even if SSRF is triggered; and removing or deactivating the Kirki plugin if the specific Customizer feature it provides is not operationally required. Blocking outbound requests may affect legitimate Kirki functionality such as Google Fonts loading or remote asset fetching - test in a staging environment before applying.
More in Wordpress Plugin
View allThe Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1
The Hash Form - Drag & Drop Form Builder plugin for WordPress is vulnerable to arbitrary file uploads due to missing fil
Authentication bypass in the LiteSpeed Cache WordPress plugin (versions prior to 6.5.0.1) allows unauthenticated remote
The Simple File List plugin for WordPress through version 4.2.2 contains an unauthenticated remote code execution vulner
The SureTriggers WordPress plugin through version 1.0.82 contains a privilege escalation vulnerability that allows unaut
The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via
The Business Directory Plugin - Easy Listing Directories for WordPress plugin for WordPress is vulnerable to time-based
SQL injection in the NotificationX WordPress plugin (versions up to and including 2.8.2) allows unauthenticated remote a
The POST SMTP Mailer - Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress i
The MasterStudy LMS WordPress Plugin - for Online Courses and Education plugin for WordPress is vulnerable to union base
The Email Subscribers by Icegram Express plugin for WordPress is vulnerable to SQL Injection via the ‘hash’ parameter in
Remote code execution in the WP Query Console WordPress plugin (versions up to and including 1.0) by Ajit Bohra allows u
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
View allShare
External POC / Exploit Code
Leaving vuln.today