CVE-2026-64638: XSS
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
wordpressto a version that resolves this vulnerability.Fixed in 7.0.3
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64638?
CVE-2026-64638 has a risk score of 60, indicating a moderate severity vulnerability.
How do I fix CVE-2026-64638?
To fix CVE-2026-64638, update your WordPress installation to version 7.0.3 or later.
What type of vulnerability is CVE-2026-64638?
CVE-2026-64638 is a pre-authenticated reflected cross-site scripting (XSS) vulnerability.
What conditions can escalate CVE-2026-64638 to remote code execution?
CVE-2026-64638 can potentially escalate to a remote code execution (RCE) vulnerability under certain conditions that are beyond the attacker’s control.
Where can I find more information about CVE-2026-64638?
Information on CVE-2026-64638 can be found in the official WordPress news release and security advisory.