WordPress Core 6.3 - 6.3.1 - Authenticated(Contributor+) Cross-Site Scripting via Footnotes Block

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS 6.4 (Medium)
Publicly Published October 12, 2023
Last Updated October 12, 2023
Researcher Jorge Costa


WordPress Core is vulnerable to Stored Cross-Site Scripting via the footnotes block in versions between 6.3 and 6.3.1 due to insufficient input sanitization and output escaping on the footnotes block. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.



1 affected software package

Software Type Core
Patched? Yes
Remediation Update to version 6.3.2, or a newer patched version
Affected Version
  • 6.3 - 6.3.1
Patched Version
  • 6.3.2

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