EUVD-2026-50115
GHSA-fvvp-v9c4-343h
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network AJAX route (AV:N/PR:N/UI:N) with reliable arbitrary-function invocation (AC:L) yielding full code execution, so C/I/A all High.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
4DescriptionCVE.org
The Streamit WordPress theme through 4.5.0 does not perform any authorization or nonce verification on one of its unauthenticated AJAX routes, which invokes an attacker-supplied PHP function with an attacker-supplied argument array, allowing unauthenticated attackers to call arbitrary functions (for example to create an administrator account), leading to privilege escalation and remote code execution.
Articles & Coverage 1
AnalysisAI
Unauthenticated remote code execution in the Streamit WordPress theme (versions up to and including 4.5.0) stems from a missing-authorization AJAX endpoint that invokes an attacker-supplied PHP function with attacker-supplied arguments, letting unauthenticated attackers create administrator accounts and run arbitrary code. Reported by WPScan and tracked as EUVD-2026-50115, it carries a CVSS 9.8 and publicly available exploit code exists, though there is no public exploit identified as being used in active attacks at time of analysis.
Technical ContextAI
Streamit is a premium video/streaming-oriented WordPress theme that registers AJAX handlers via WordPress's admin-ajax.php mechanism using the wp_ajax_nopriv_* hook, which exposes actions to unauthenticated visitors. This is a CWE-94 (Code Injection) flaw: one nopriv AJAX route accepts a PHP function name and an argument array from the request and dispatches them through a variable-function or call_user_func-style invocation without any capability check or nonce (CSRF token) validation. Because WordPress's function space includes primitives like wp_insert_user/wp_create_user and other side-effecting calls, arbitrary-function invocation with controlled arguments is effectively a code-execution and account-provisioning primitive.
RemediationAI
No specific vendor-released patched version is identified in the provided data, so no vendor-released patch is confirmed at time of analysis; consult the WPScan advisory (https://wpscan.com/vulnerability/f85c5da1-412f-4079-8c44-708bc78c2b9b/) and the theme vendor/ThemeForest listing for a release above 4.5.0 and upgrade to it as the primary fix once available. As compensating controls, block or restrict the vulnerable unauthenticated action by adding a WAF/mod_security rule that filters the specific admin-ajax.php action parameter used by this route (trade-off: requires identifying the exact action name from the WPScan writeup and may break legitimate theme AJAX features), restrict access to /wp-admin/admin-ajax.php at the reverse proxy where feasible without breaking front-end functionality, and audit wp_users for unexpected administrator accounts created since exposure, rotating credentials and reviewing installed plugins/files for webshells. If a patched release is not promptly available, switching to an alternate theme or hardening file permissions to prevent PHP writes will reduce the RCE blast radius.
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Same weakness CWE-94 – Code Injection
View allSame technique Privilege Escalation
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External POC / Exploit Code
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