CVE-2026-7615: Widget Context WordPress Plugin CSRF Flaw

CVE-2026-7615 Overview

CVE-2026-7615 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Widget Context plugin for WordPress. The flaw exists in all versions up to and including 1.3.3 and stems from missing or incorrect nonce validation on the save_widget_context_settings function. Unauthenticated attackers can modify widget visibility context settings stored in the WordPress options table by sending a forged POST request to /wp-admin/widgets.php. Successful exploitation requires tricking a site administrator into clicking a malicious link or visiting an attacker-controlled page while authenticated. The vulnerability is tracked under [CWE-352].

Critical Impact
Attackers can modify widget visibility settings on a WordPress site by tricking authenticated administrators into clicking malicious links, altering site content presentation logic without authorization.

Affected Products

Widget Context plugin for WordPress, all versions through 1.3.3
WordPress sites with the plugin active and accessible admin sessions
Administrator accounts with capability to manage widgets

Discovery Timeline

2026-05-22 - CVE-2026-7615 published to the National Vulnerability Database
2026-05-22 - Last updated in NVD database

Technical Details for CVE-2026-7615

Vulnerability Analysis

The Widget Context plugin extends WordPress widgets with visibility rules that determine where each widget appears. The save_widget_context_settings function persists these rules to the WordPress options table. The function processes incoming POST data submitted through /wp-admin/widgets.php but does not verify a valid WordPress nonce token before applying changes. Without nonce enforcement, the server cannot distinguish a legitimate administrator submission from a forged request originating off-site.

An attacker hosts a page containing a hidden form or auto-submitting JavaScript that targets the vulnerable endpoint. When an authenticated administrator visits the attacker's page, the browser automatically attaches the WordPress session cookie to the cross-origin request. The plugin accepts the request and writes attacker-controlled widget context settings to the database.

Root Cause

The root cause is the absence of CSRF nonce validation in the request handler. WordPress provides wp_verify_nonce() and check_admin_referer() helpers specifically to prevent this class of attack, but the affected code paths in WidgetContext.php at lines 91, 282, and 311 process settings updates without invoking these checks. State-changing operations therefore rely solely on cookie-based session authentication, which browsers transmit automatically on cross-origin requests.

Attack Vector

Exploitation is network-based and requires user interaction from a privileged user. The attacker crafts an HTML page that issues a POST request to the target site's /wp-admin/widgets.php endpoint with parameters mimicking a legitimate widget context save operation. The attacker then delivers the link through phishing email, forum posts, or any channel that can reach a WordPress administrator. When the administrator loads the page in a browser session already authenticated to the target site, the request executes with full administrative privileges against the widget settings. The impact is limited to integrity of widget visibility configuration; no confidentiality or availability impact is reported.

Detection Methods for CVE-2026-7615

Indicators of Compromise

Unexpected modifications to the widget_contexts entries in the WordPress wp_options table
Inbound POST requests to /wp-admin/widgets.php with Referer headers pointing to external domains
Administrator browser sessions visiting unfamiliar external URLs immediately before widget configuration changes
Widget visibility rules that administrators do not recall configuring

Detection Strategies

Audit WordPress activity logs for changes to widget context options correlated with cross-origin referrers
Review web server access logs for POST requests to /wp-admin/widgets.php lacking same-origin referrers or expected nonce parameters
Compare current values of widget context options against known-good backups to identify unauthorized changes

Monitoring Recommendations

Enable a WordPress audit logging plugin that records option table changes with originating user and IP
Forward web server access logs to a centralized SIEM and alert on administrative endpoint requests with external referrers
Monitor administrator account browser activity for sequences suggesting CSRF delivery, such as new external link clicks followed by privileged actions

How to Mitigate CVE-2026-7615

Immediate Actions Required

Update the Widget Context plugin to a patched release once the vendor publishes a version above 1.3.3
Restrict administrator browsing habits and require separate browser profiles for WordPress administration
Review the current widget context settings and restore any unauthorized modifications from backup

Patch Information

A fix has been proposed via the upstream GitHub Pull Request. Site operators should monitor the Wordfence Vulnerability Analysis for the released patched version and apply the update through the WordPress plugin manager as soon as it becomes available. Refer to the vulnerable code at the WordPress Plugin Code Reference for context on the fix scope.

Workarounds

Deactivate the Widget Context plugin until a patched version is available if widget visibility rules are not business-critical
Deploy a web application firewall rule that blocks POST requests to /wp-admin/widgets.php lacking a same-origin Referer header
Require administrators to log out of WordPress when not actively managing the site to reduce the window for CSRF exploitation
Implement browser-level protections such as SameSite=Strict cookies through a security plugin to limit cross-site cookie transmission

bash

# Example WAF rule (ModSecurity) to block cross-origin POSTs to widgets.php
SecRule REQUEST_METHOD "@streq POST" \
  "chain,id:1009001,phase:1,deny,status:403,msg:'CSRF: cross-origin POST to widgets.php'"
  SecRule REQUEST_URI "@contains /wp-admin/widgets.php" \
    "chain"
    SecRule REQUEST_HEADERS:Referer "!@beginsWith https://your-wordpress-site.example/" \
      "t:none"