CVE-2026-5371: Unauthorized Access in MonsterInsights WordPress Plugin
Platform
wordpress
Component
google-analytics-for-wordpress
Fixed in
10.1.3
CVE-2026-5371 is a vulnerability affecting the MonsterInsights WordPress plugin, a popular tool for Google Analytics integration. This flaw allows authenticated attackers, even those with Subscriber-level access, to retrieve live Google OAuth access tokens and manipulate the plugin's Google Ads integration. The vulnerability exists in versions up to 10.1.2 and has been resolved in version 10.1.3, released on May 12, 2026.
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Impact and Attack Scenarios
The primary impact of CVE-2026-5371 is the unauthorized access and potential misuse of Google OAuth access tokens. An attacker who exploits this vulnerability could gain access to sensitive data associated with the website's Google Analytics and Google Ads accounts. This could include user data, campaign performance metrics, and potentially even billing information. The ability to reset the Google Ads integration further amplifies the impact, allowing an attacker to disrupt advertising campaigns and potentially redirect funds. While the vulnerability requires authentication, the low access level needed (Subscriber) significantly broadens the attack surface.
Exploitation Context
The vulnerability was published on May 12, 2026. No public exploits or proof-of-concept code have been observed at the time of writing. The CVSS score of 7.1 (HIGH) indicates a significant risk, and the ease of exploitation (requiring only Subscriber-level access) suggests that it could become a target for opportunistic attackers. The vulnerability is not currently listed on KEV or EPSS, but its potential impact warrants close monitoring.
Threat Intelligence
Exploit Status
EPSS
0.03% (8% percentile)
CISA SSVC
CVSS Vector
What do these metrics mean?
- Attack Vector
- Network — remotely exploitable over the internet. No physical or local access required. Widest attack surface.
- Attack Complexity
- Low — no special conditions required. Attacker can exploit reliably without depending on rare configurations or timing.
- Privileges Required
- Low — any valid user account is sufficient. Basic authenticated access required.
- User Interaction
- None — attack is automatic and silent. Victim does nothing: no click, no file open.
- Scope
- Unchanged — impact is limited to the vulnerable component itself.
- Confidentiality
- High — complete confidentiality loss. Attacker can read all data: credentials, keys, personal data.
- Integrity
- Low — attacker can modify some data with limited scope or impact.
- Availability
- None — no availability impact. Service remains fully operational.
Weakness Classification (CWE)
Timeline
- Reserved
- Published
- Modified
- EPSS updated
Mitigation and Workarounds
The primary mitigation for CVE-2026-5371 is to immediately upgrade the MonsterInsights plugin to version 10.1.3 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider temporarily restricting access to the getadsaccesstoken() and resetexperience() functions. While not a complete fix, this can limit the attacker's ability to exploit the vulnerability. Review WordPress user roles and permissions to ensure that only necessary users have access. Monitor WordPress logs for suspicious activity related to Google OAuth authentication. After upgrading, confirm the fix by attempting to access the Google Ads integration with a Subscriber-level user account and verifying that access is denied.
How to fix
Update to version 10.1.3, or a newer patched version
Frequently asked questions
What is CVE-2026-5371 — Unauthorized Access in MonsterInsights WordPress Plugin?
CVE-2026-5371 is a HIGH severity vulnerability in the MonsterInsights WordPress plugin that allows authenticated subscribers to retrieve Google OAuth tokens and reset Google Ads integration, potentially leading to data exposure and campaign disruption.
Am I affected by CVE-2026-5371 in MonsterInsights WordPress Plugin?
You are affected if you are using the MonsterInsights plugin in WordPress versions 10.1.2 or earlier. Check your plugin version and upgrade immediately if necessary.
How do I fix CVE-2026-5371 in MonsterInsights WordPress Plugin?
Upgrade the MonsterInsights plugin to version 10.1.3 or later. If immediate upgrade is not possible, temporarily restrict access to the vulnerable functions and review user permissions.
Is CVE-2026-5371 being actively exploited?
No public exploits have been observed at this time, but the vulnerability's ease of exploitation and potential impact suggest it could become a target. Continuous monitoring is recommended.
Where can I find the official MonsterInsights advisory for CVE-2026-5371?
Refer to the official MonsterInsights website and WordPress plugin repository for the latest security advisories and updates related to CVE-2026-5371.
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