CVE-2026-8438
Stored XSS in All-In-One Security WordPress Plugin
Publication date: 2026-06-06
Last updated on: 2026-06-06
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wordfence | all_in_one_security | to 5.4.7 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The All-In-One Security (AIOS) – Security and Firewall plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in versions up to and including 5.4.7. This occurs because the plugin does not properly sanitize input in the get_rest_route() function and fails to escape output in the column_default() method of the debug log list table.
When the 'Disable REST API for non-logged in users' feature is enabled along with debug logging, an unauthenticated attacker can insert arbitrary HTML or JavaScript into the REST request path. This path is decoded and stored directly in the debug log without sanitization.
When an administrator views the debug log page, the malicious script executes in their browser, potentially allowing the attacker to steal security tokens (nonces), perform privileged actions, and possibly take over the entire site.
How can this vulnerability impact me? :
This vulnerability can lead to serious security impacts including unauthorized execution of JavaScript in an administrator's browser session.
- The attacker can steal security tokens (nonces) used to protect against CSRF attacks.
- The attacker can perform privileged AJAX or REST API actions without authentication.
- There is a risk of full site compromise if the attacker leverages the vulnerability effectively.