CVE-2026-64638CWE-79cross-site-scripting

CVE-2026-64638

published August 7, 2026

CVSS
8.9
EPSS
1%
Percentile
59.1
In the wild
Unconfirmed
What it is

WordPress is vulnerable to a pre-auth reflected XSS vulnerability on the login screen.

Via a specially crafted malicious third-party website hosted by an attacker, it is possible for this to be escalated to an RCE vulnerability with conditions outside of the attackers control. This requires successful social engineering of and explicit interaction by the target victim.

This issue affects all versions of WordPress. Version 7.0.3 has been released, containing a fix for the vulnerability, and as a courtesy to users on older branches the fix has been backported to all branches back to 4.7.

Discovered and responsibly disclosed by [the team at pwn.ai](https://pwn.ai/).

The record
Technical detail
CVSS
8.9 · NONE
CVSS v4.0
Not supplied
EPSS
0.00894 · 59.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-07T22:17Z
References (2)
EPSS history
Timeline
  • 25 SEP 03:27Z
    EPSS moved 31% → 1%
    epss
  • 07 AUG 18:02Z
    WordPress is vulnerable to a pre-auth reflected XSS vulnerability on the login screen
    cvelistv5