WordPress Core <= 7.0.2 — Unauthenticated Reflected Cross-Site Scripting via log Parameter
CVE-2026-64638Published · Updated Action summary
Affected: ≤7.0.2Update to 4.7.34 or 4.8.29 or 4.9.30 or 5.0.26 or 5.1.23 or 5.2.25 or 5.3.22 or 5.4.20 or 5.5.19 or 5.6.18 or 5.7.16 or 5.8.14 or 5.9.14 or 6.0.13 or 6.1.11 or 6.2.10 or 6.3.9 or 6.4.9 or 6.5.9 or 6.6.6 or 6.7.6 or 6.8.7 or 6.9.6 or 7.0.3 or newer
Fixed versions are per release branch: update to the fix for the branch you run.
All remediation stepsOn this page3
Overview
- Advisory ID
- CVE-2026-64638
- Product
- WordPress wordpress
- Affected
- ≤7.0.2
- Fixed in
- 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
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- No account needed
- Published
- · updated
- Credit
- pwn.ai Team
- Source
- Wordfence Intelligence
- Affected≤ 7.0.2
- Patched in4.7.34 / 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
Update to 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 or newer.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
WordPress Core is vulnerable to Reflected Cross-Site Scripting via the 'log' parameter in all versions up to, and including, 7.0.2 due to insufficient input sanitization and output escaping of the authentication error messages rendered on the login screen. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as visiting a specially crafted, attacker-controlled page that submits a request to the vulnerable site.
Not sure which version you run? Run a passive check — it reads public files only.
Remediation & mitigations
- Update to one of the following versions, or a newer patched version: 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
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
References & provenance
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Timeline
CVE published
Severity medium, CVSS 6.1
Record last updated
Sources & licenses
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.