Cross-site scripting in WordPress - CVE-2026-64638

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Main Vulnerability Database Vulnerabilities #VU141175

Cross-site scripting in WordPress - CVE-2026-64638

Published: August 7, 2026 / Updated: August 21, 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: Public exploit is 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
Debian Linux
Fedora
wordpress (Debian package)
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 (Debian package) - update to 6.8.7+dfsg1-0+deb13u1
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, 6.9.7-1.el9, 6.9.7-1.el10_2, 6.9.7-1.fc43, 6.9.7-1.fc44, 7.0.3-1.el10_3, 7.0.4-1.el10_3

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins