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Always-Incorrect Control Flow Implementation

CVE-2020-35477

Medium
5.3/10

Summary

MediaWiki prior to 1.31.11, 1.32.x , 1.33.x , 1.34.x, 1.35.x prior to 1.35.1 blocks legitimate attempts to hide log entries in some situations. If one sets MediaWiki:Mainpage to "Special:MyLanguage/Main Page", visits a log entry on Special:Log, and toggles the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it, there is a redirection to the main page's action=historysubmit (instead of the desired behavior in which a revision-deletion form appears).

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • NONE

CWE-670 - Always-Incorrect Control Flow Implementation

The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.

References

Advisory Timeline

  • Published