WordPress Core 4.7.0 - 6.3.1 - Sensitive Information Exposure via User Search REST Endpoint

Exposure of Sensitive Information to an Unauthorized Actor
CVE CVE-2023-5561
CVSS Medium (5.3)
Publicly Published October 12, 2023
Last Updated January 22, 2024
Researcher Marc-Alexandre Montpas
Description

WordPress Core is vulnerable to Sensitive Information Exposure in versions between 4.7.0 and 6.3.1 via the User REST endpoint. While the search results do not display user email addresses unless the requesting user has the 'list_users' capability, the search is applied to the user_email column. This can allow unauthenticated attackers to brute force or verify the email addresses of users with published posts or pages on the site.

References

1 affected software package

Software Type Core
Software Slug wordpress (view on wordpress.org)
Patched? Yes
Affected Version
  • 4.7 - 4.7.26
  • 4.8 - 4.8.22
  • 4.9 - 4.9.23
  • 5.0 - 5.0.19
  • 5.1 - 5.1.16
  • 5.2 - 5.2.18
  • 5.3 - 5.3.15
  • 5.4 - 5.4.13
  • 5.5 - 5.5.12
  • 5.6 - 5.6.11
  • 5.7 - 5.7.9
  • 5.8 - 5.8.7
  • 5.9 - 5.9.7
  • 6.0 - 6.0.5
  • 6.1 - 6.1.3
  • 6.2 - 6.2.2
  • 6.3 - 6.3.1
Patched Version
  • 4.7.27
  • 4.8.23
  • 4.9.24
  • 5.0.20
  • 5.1.17
  • 5.2.19
  • 5.3.16
  • 5.4.14
  • 5.5.13
  • 5.6.12
  • 5.7.10
  • 5.8.8
  • 5.9.8
  • 6.0.6
  • 6.1.4
  • 6.2.3
  • 6.3.2
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