Cross-site scripting in WordPress - CVE-2026-64638
Published: August 7, 2026
Vulnerability identifier: #VU141175
CSH Severity: High
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-64638
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the login screen. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information and potentially compromise the affected website.
Affected software
WordPress
Fedora
wordpress
Fedora
wordpress
How to mitigate CVE-2026-64638
Install updates from vendor's website.
WordPress - addressed in versions 4.7.34, 4.8.29, 4.9.30, 5.0.26, 5.1.23, 5.2.25, 5.3.22, 5.4.20, 5.5.19, 5.6.18, 5.7.16, 5.8.14, 5.9.14, 6.0.13, 6.1.11, 6.2.10, 6.3.9, 6.4.9, 6.5.9, 6.6.6, 6.7.6, 6.8.7, 6.9.6, 7.0.3
wordpress - addressed in versions 6.9.6-1.el9, 6.9.6-1.el10_2, 6.9.6-1.fc43, 6.9.6-1.fc44, 7.0.3-1.el10_3
wordpress - addressed in versions 6.9.6-1.el9, 6.9.6-1.el10_2, 6.9.6-1.fc43, 6.9.6-1.fc44, 7.0.3-1.el10_3