CVE-2026-3478
Content Syndication Toolkit <= 1.3 - Unauthenticated Server-Side Request Forgery via 'url' Parameter
Description
The Content Syndication Toolkit plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.3 via the redux_p AJAX action in the bundled ReduxFramework library. The plugin registers a proxy endpoint (wp_ajax_nopriv_redux_p) that is accessible to unauthenticated users. The proxy() method in the Redux_P class takes a URL directly from $_GET['url'] without any validation (the regex is set to /.*/ which matches all URLs) and passes it to wp_remote_request(), which does not have built-in SSRF protection like wp_safe_remote_request(). There is no authentication check, no nonce verification, and no URL restriction. The response from the requested URL is then returned to the attacker, making this a full-read SSRF. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services, scan internal network ports, or interact with cloud metadata endpoints.
INFO
Published Date :
March 21, 2026, 4:17 a.m.
Last Modified :
March 21, 2026, 4:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-3478
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Content Syndication Toolkit plugin.
- Remove the ReduxFramework library if not needed.
- Implement URL validation and authentication checks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3478.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3478 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3478
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3478 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3478 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Mar. 21, 2026
Action Type Old Value New Value Added Description The Content Syndication Toolkit plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.3 via the redux_p AJAX action in the bundled ReduxFramework library. The plugin registers a proxy endpoint (wp_ajax_nopriv_redux_p) that is accessible to unauthenticated users. The proxy() method in the Redux_P class takes a URL directly from $_GET['url'] without any validation (the regex is set to /.*/ which matches all URLs) and passes it to wp_remote_request(), which does not have built-in SSRF protection like wp_safe_remote_request(). There is no authentication check, no nonce verification, and no URL restriction. The response from the requested URL is then returned to the attacker, making this a full-read SSRF. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services, scan internal network ports, or interact with cloud metadata endpoints. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-918 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/tags/1.3/inc/ReduxFramework/ReduxCore/inc/class.p.php#L161 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/tags/1.3/inc/ReduxFramework/ReduxCore/inc/class.p.php#L219 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/tags/1.3/inc/ReduxFramework/ReduxCore/inc/class.p.php#L7 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/trunk/inc/ReduxFramework/ReduxCore/inc/class.p.php#L161 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/trunk/inc/ReduxFramework/ReduxCore/inc/class.p.php#L219 Added Reference https://plugins.trac.wordpress.org/browser/content-syndication-toolkit/trunk/inc/ReduxFramework/ReduxCore/inc/class.p.php#L7 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/f8381866-d991-4638-ab4d-3b8697acf414?source=cve