WordPress Core < 6.0.3 - Shared User Instance Weakness

Exposure of Data Element to Wrong Session
CVE Not available
CVSS Low (3.7)
Publicly Published October 18, 2022
Last Updated January 22, 2024
Researcher Ben Bidner, Alex Concha
Description

WordPress Core in versions up to 6.0.3 had a weakness in how Share User Instances were handled. This fix appears to have been necessary to safely use the wp_set_current_user( 0 ); method to patch the previously mentioned XSS and CSRF in wp-mail.php and wp-trackback.php vulnerabilities. The previous functionality may have resulted in third party plugins or themes using the wp_set_current_user function in a way that could lead to privilege escalation and users being able to perform more actions than originally intended.

References

1 affected software package

Software Type Core
Software Slug wordpress (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.6.1
  • 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
  • 5.6 - 5.6.9
  • 5.7 - 5.7.7
  • 5.8 - 5.8.5
  • 5.9 - 5.9.4
  • 6.0 - 6.0.2
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
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