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6.5

Login With Ajax versions <= 4.5.1: Malicious scripts injected in login form

CVE-2026-66640 · published 2 months ago
Summary

If you use Login With Ajax, an attacker could inject malicious scripts into your login form, potentially stealing login credentials or taking control of your website. To fix this, update to version 4.5.2 or later. This issue is resolved in the latest version.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
marcus (aka @msykes) login with ajax <= 4.5.1
Original advisory text
WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published18 Aug 2026
Updated4 Nov 2026
First seen18 Aug 2026
Sources
CVE-2026-66640 · NVD
CVE-2026-66640 · MITRE
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