WordPress Core < 6.0.3 - Authenticated (Admin+) Stored Cross-Site Scripting via Customizer

5.5
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS 5.5 (Medium)
Publicly Published October 18, 2022
Last Updated January 22, 2024
Researcher Alex Concha

Description

WordPress Core is vulnerable to Stored Cross-Site Scripting via the Customizer in versions up to 6.0.3. This is due to insufficient escaping on the 'Blog Name' value that could be edited and become executable with the right payload while in the theme customizer. This would make it possible for authenticated attacker with access to customize a theme, such as administrators to inject malicious JavaScript into the page.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for WordPress

Software Type Core
Patched? Yes
Remediation Update to one of the following versions, or a newer patched version: 3.7.40, 3.8.40, 3.9.38, 4.0.37, 4.1.37, 4.2.34, 4.3.30, 4.4.29, 4.5.28, 4.6.25, 4.7.25, 4.8.21, 4.9.22, 5.0.18, 5.1.15, 5.2.17, 5.3.14, 5.4.12, 5.5.11, 5.6.10, 5.7.8, 5.8.6, 5.9.5, 6.0.3
Affected Versions
  • <= 3.6.1
  • 5.6 - 5.6.9
  • 5.7 - 5.7.7
  • 5.8 - 5.8.5
Expand to see 21 more affected version ranges.
  • 5.9 - 5.9.4
  • 6.0 - 6.0.2
  • 3.7 - 3.7.39
  • 3.8 - 3.8.39
  • 3.9 - 3.9.37
  • 4.0 - 4.0.36
  • 4.1 - 4.1.36
  • 4.2 - 4.2.33
  • 4.3 - 4.3.29
  • 4.4 - 4.4.28
  • 4.5 - 4.5.27
  • 4.6 - 4.6.24
  • 4.7 - 4.7.24
  • 4.8 - 4.8.20
  • 4.9 - 4.9.21
  • 5.0 - 5.0.17
  • 5.1 - 5.1.14
  • 5.2 - 5.2.16
  • 5.3 - 5.3.13
  • 5.4 - 5.4.11
  • 5.5 - 5.5.10
Patched Versions
  • 3.7.40
  • 3.8.40
  • 3.9.38
  • 4.0.37
Expand to see 20 more patched versions.
  • 4.1.37
  • 4.2.34
  • 4.3.30
  • 4.4.29
  • 4.5.28
  • 4.6.25
  • 4.7.25
  • 4.8.21
  • 4.9.22
  • 5.0.18
  • 5.1.15
  • 5.2.17
  • 5.3.14
  • 5.4.12
  • 5.5.11
  • 5.6.10
  • 5.7.8
  • 5.8.6
  • 5.9.5
  • 6.0.3

Recent vulnerabilities in WordPress

# Title CVE ID CVSS Researchers Date
1 WordPress <= 6.9.1 - Cross-Site Scripting via Client-Side Template Override in Admin Area 4.4 Asaf Mozes March 10, 2026
2 WordPress <= 6.9.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via Navigation Menu Items 4.4 sibwtf March 10, 2026
3 WordPress <= 6.9.1 - Unauthenticated Blind Server-Side Request Forgery via XML-RPC Pingback Discovery 5.8 sibwtf March 10, 2026
4 WordPress <= 6.9.1 - Authenticated (Author+) XML External Entity Injection via getID3 Library Media Upload 6.5 Youssef Achtatal March 10, 2026
5 WordPress 6.9 - 6.9.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Note Creation via REST API CVE-2026-3906 4.3 kaminuma March 10, 2026
6 WordPress <= 6.9.1 - Missing Authorization to Authenticated (Author+) Sensitive Information Disclosure via query-attachments AJAX Endpoint 4.3 Vitaly Simonovich March 10, 2026
7 WordPress <= 6.8.2 - Authenticated (Author+) Stored Cross-Site Scripting CVE-2025-58674 6.4 SavPhill (Savphill) September 22, 2025
8 WordPress <= 6.8.2 - Authenticated (Contributor+) Sensitive Information Exposure CVE-2025-58246 4.3 Abu Hurayra (HurayraIIT) September 22, 2025
9 WordPress Core < 6.5.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via HTML API CVE-2024-6307 6.4 Alex Concha, Dennis Snell, Grzegorz Ziółkowski, Aaron Jorbin June 24, 2024
10 WordPress Core < 6.5.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via Template Part Block CVE-2024-31111 6.4 Rafie Muhammad June 24, 2024

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