CVE-2026-1393 Overview
CVE-2026-1393 affects the Add Google Social Profiles to Knowledge Graph Box plugin for WordPress in all versions up to and including 1.0. The plugin fails to validate nonces on its settings update functionality, exposing administrators to Cross-Site Request Forgery [CWE-352]. Unauthenticated attackers can craft a malicious link or page that updates the plugin's Knowledge Graph settings when an authenticated administrator interacts with it. Exploitation requires user interaction but no authentication on the attacker side.
Critical Impact
An attacker who tricks a WordPress administrator into clicking a crafted link can modify the plugin's Knowledge Graph settings, affecting how social profile metadata is exposed on the site.
Affected Products
- Add Google Social Profiles to Knowledge Graph Box plugin for WordPress
- All versions through 1.0
- WordPress sites with the plugin installed and active
Discovery Timeline
- 2026-03-21 - CVE-2026-1393 published to the National Vulnerability Database (NVD)
- 2026-04-22 - Entry last modified in NVD
Technical Details for CVE-2026-1393
Vulnerability Analysis
The vulnerability is a Cross-Site Request Forgery (CSRF) flaw classified under [CWE-352]. The plugin's settings update handler in gsp-options.php processes administrator requests to change Knowledge Graph configuration values. The handler does not verify a WordPress nonce token before applying changes, so it cannot distinguish between legitimate administrator submissions and forged cross-origin requests.
Because WordPress relies on session cookies for administrator authentication, any HTTP request issued by an authenticated administrator's browser carries valid credentials. An attacker who controls a webpage visited by that administrator can trigger a state-changing request to the vulnerable endpoint, and the plugin will accept it as authorized.
The impact is limited to integrity of the plugin's settings. Confidentiality and availability are not directly affected, which aligns with the medium severity rating.
Root Cause
The root cause is missing nonce validation on the settings update functionality. WordPress provides wp_nonce_field() and check_admin_referer() primitives for CSRF protection, but the affected handler in gsp-options.php omits these checks. Without a nonce, the server has no token-based proof that the request originated from a deliberate administrator action inside the WordPress admin interface.
Attack Vector
Exploitation follows the standard CSRF pattern. The attacker hosts a page containing an auto-submitting HTML form or an image tag pointing at the plugin's settings endpoint with attacker-chosen parameters. The attacker then lures a logged-in WordPress administrator to that page through phishing, a forum comment, or any other vector that leads to a browser visit.
When the administrator's browser loads the malicious content, it sends the forged request to the WordPress site along with the administrator's session cookie. The plugin processes the request and overwrites the Knowledge Graph social profile settings with attacker-controlled values. Refer to the Wordfence Vulnerability Analysis and the WordPress Plugin Code Review for the unprotected handler.
Detection Methods for CVE-2026-1393
Indicators of Compromise
- Unexpected changes to Knowledge Graph social profile URLs in the plugin's settings.
- WordPress access log entries showing POST requests to the plugin's options page with a Referer header pointing to an external domain.
- Settings updates recorded outside of normal administrator working hours or from unfamiliar IP addresses.
Detection Strategies
- Inspect web server access logs for POST requests targeting gsp-options.php or the plugin's admin options endpoint without a same-origin Referer.
- Compare the current plugin settings against a known-good baseline to identify unauthorized modifications.
- Review browser-side phishing telemetry for links pointing at WordPress administrator URLs combined with attacker-controlled query parameters.
Monitoring Recommendations
- Enable WordPress activity logging to capture option changes made via update_option calls tied to the plugin.
- Alert on settings modifications that occur without a corresponding administrator login event in the same session window.
- Track outbound clicks from administrator accounts to untrusted domains via email gateway or browser isolation telemetry.
How to Mitigate CVE-2026-1393
Immediate Actions Required
- Deactivate the Add Google Social Profiles to Knowledge Graph Box plugin until a patched version is available.
- Audit current plugin settings and restore the intended Knowledge Graph values if tampering is detected.
- Instruct WordPress administrators to log out of the admin panel before browsing untrusted sites.
Patch Information
No vendor patch is referenced in the NVD entry at the time of publication. The vulnerability affects all versions up to and including 1.0. Monitor the WordPress Plugin Development File and the Wordfence Vulnerability Analysis for an updated release that adds wp_nonce_field() and check_admin_referer() to the settings handler.
Workarounds
- Remove or replace the plugin with a maintained alternative that implements nonce validation.
- Apply a Web Application Firewall (WAF) rule that blocks POST requests to the plugin's options endpoint when the Referer header is missing or cross-origin.
- Restrict WordPress administrator accounts to dedicated browsers or sessions that are not used for general web browsing.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
