CVE-2026-57751: Heateor Social Login CSRF Vulnerability

CVE-2026-57751 Overview

CVE-2026-57751 is an unauthenticated Cross-Site Request Forgery (CSRF) vulnerability in the Heateor Social Login WordPress plugin. The flaw affects plugin versions 1.1.39 and earlier. It falls under [CWE-352], indicating missing or insufficient CSRF token validation on state-changing requests.

An attacker can craft a malicious web page that triggers privileged actions when a targeted administrator visits it. Successful exploitation requires user interaction and delivers high impact to confidentiality and integrity of the WordPress site.

Critical Impact
An unauthenticated attacker can forge administrator-level requests against the Heateor Social Login plugin, potentially altering plugin configuration and exposing sensitive site data.

Affected Products

Heateor Social Login WordPress plugin versions <= 1.1.39
WordPress installations with the vulnerable plugin active
Any site administrator session interacting with attacker-controlled content

Discovery Timeline

2026-07-02 - CVE-2026-57751 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-57751

Vulnerability Analysis

The vulnerability stems from missing anti-CSRF protection on state-changing endpoints in the Heateor Social Login plugin. WordPress provides nonce-based request verification through wp_nonce_field() and check_admin_referer(), but the affected plugin routes do not enforce these checks. An attacker can therefore replay authenticated administrator requests from an external origin.

Exploitation typically involves social engineering. The attacker hosts a page that auto-submits a hidden form or issues a background request to the WordPress admin endpoint used by the plugin. When an authenticated administrator visits the page, the browser attaches session cookies, and WordPress processes the forged action as legitimate.

The impact aligns with the plugin's administrative functionality. Modifying social login configuration can enable account takeover paths, redirect OAuth flows to attacker-controlled providers, or expose API secrets stored in plugin settings.

Root Cause

The root cause is the absence of CSRF token validation [CWE-352] on privileged plugin actions. Requests are trusted based solely on the authenticated session cookie, without a per-request nonce tied to the user and action.

Attack Vector

The attack vector is network-based and requires user interaction. An administrator must be logged into WordPress and must load or interact with attacker-controlled content, such as a phishing link or a malicious advertisement. No credentials are required from the attacker.

For technical specifics, review the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-57751

Indicators of Compromise

Unexpected modifications to Heateor Social Login plugin settings, OAuth client IDs, or redirect URIs.
Administrator HTTP POST requests to plugin endpoints with Referer headers pointing to external domains.
New or modified social login provider entries that were not initiated by staff.

Detection Strategies

Inspect web server access logs for state-changing requests to plugin admin URLs lacking a WordPress nonce parameter (_wpnonce).
Alert on administrator sessions submitting POST requests with cross-origin Referer or Origin values.
Compare current plugin configuration against a known-good baseline to detect unauthorized drift.

Monitoring Recommendations

Enable WordPress audit logging to record plugin option changes and administrator activity.
Monitor authentication and OAuth callback flows for anomalies introduced through altered plugin settings.
Forward WordPress and reverse proxy logs to a central analytics platform for correlation with browser-side referrer telemetry.

How to Mitigate CVE-2026-57751

Immediate Actions Required

Update Heateor Social Login to a version newer than 1.1.39 once a patched release is available from the vendor.
Audit plugin configuration for unauthorized changes, especially OAuth provider settings and redirect URLs.
Require administrators to log out of WordPress before browsing untrusted sites and enforce short session lifetimes.

Patch Information

Refer to the Patchstack Vulnerability Report for vendor patch status. Until a fixed version is confirmed, treat all versions <= 1.1.39 as vulnerable.

Workarounds

Deactivate the Heateor Social Login plugin until a patched version is deployed.
Deploy a Web Application Firewall (WAF) rule that blocks POST requests to plugin admin endpoints missing a valid _wpnonce parameter.
Restrict WordPress administrator access to dedicated browsers or profiles that are not used for general web browsing.
Enforce SameSite=Lax or SameSite=Strict cookies on the WordPress session to reduce cross-site request risk.

bash

# Example WAF rule concept (ModSecurity) to block plugin POSTs without a nonce
SecRule REQUEST_METHOD "@streq POST" \
  "chain,phase:2,deny,status:403,id:1002026,\
   msg:'Blocked Heateor Social Login POST without nonce'"
SecRule REQUEST_URI "@contains /wp-admin/" "chain"
SecRule ARGS_NAMES "!@rx ^_wpnonce$"