xmlrpc attacks blocker <= 1.0 - Unauthenticated Stored Cross-Site Scripting via 'X-Forwarded-For'

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-2502
CVSS Medium (6.1)
Publicly Published February 18, 2026
Last Updated February 19, 2026
Researcher Nabil Irawan
Description

The xmlrpc attacks blocker plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 1.0, via the 'X-Forwarded-For' HTTP header. This is due to the plugin trusting and logging attacker-controlled IP header data and rendering debug log entries without output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the debug log page.

References

1 affected software package

Software Type Plugin
Software Slug xmlrpc-attacks-blocker (view on wordpress.org)
Patched? No
Affected Version
  • <= 1.0
Patched Version
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