WordPress Core < 6.0.3 & Gutenberg < 14.3.1 - Authenticated Cross-Site Scripting in Various Blocks

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6.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS 6.4 (Medium)
Publicly Published October 18, 2022
Last Updated January 22, 2024
Researcher Alex Concha

Description

WordPress Core in versions up to 6.0.3 and the Gutenberg plugin for WordPress in versions up to 14.3.1 are vulnerable to Stored Cross-Site Scripting due to insufficient output escaping on user supplied input. The RSS widget, Search Block, Featured Image Block, RSS Block, and Navigation Block are all affected components. This makes it possible for authenticated users with access to the block editor to inject malicious web scripts that may execute whenever accessing the page.

References

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Vulnerability Details for Gutenberg

Gutenberg

Software Type Plugin
Software Slug gutenberg (view on wordpress.org)
Patched? Yes
Remediation Update to version 14.3.1, or a newer patched version
Affected Version
  • <= 14.3.0
Patched Version
  • 14.3.1

1 other affected software package

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

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