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This issue affects 1 person(s).
 2
IDProjectCategoryView StatusLast Update
20546Bug reportsSurvey participants (Tokens)public2026-06-03 13:34
ReporterJoshua Kuckherm Assigned To 
PrioritynoneSeveritypartial_block 
Status newResolutionopen 
Product Version6.17.x 
Summary20546: Error message 400:The CSRF token could not be verified
Description

A participant of our survey got an error message and couldnt do the survey because of that. He is the only one (from who we know) with this error ( 400:The CSRF token could not be verified.).

Steps To Reproduce

The problem is that the error only occured by one of our survey-participants (from who we know).

TagsNo tags attached.
Attached Files
Fehlermeldung Lime.png (29,627 bytes)   
Fehlermeldung Lime.png (29,627 bytes)   
Bug heat2
Complete LimeSurvey version number (& build) LimeSurvey Community Edition Version 6.17.4+260520
I will donate to the project if issue is resolvedNo
BrowserMozilla Firefox
Database type & versionDon´t know
Server OS (if known)
Webserver software & version (if known)
PHP VersionDon´t know

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tibor.pacalat

tibor.pacalat

2026-06-03 13:34

administrator   ~84983

The error message is not triggered by one certain root cause. I would advise to monitor this issue and try to figure out in which situations the issue occurs.

Issue History

Date Modified Username Field Change
2026-06-03 11:30 Joshua Kuckherm New Issue
2026-06-03 11:30 Joshua Kuckherm File Added: Fehlermeldung Lime.png
2026-06-03 13:34 tibor.pacalat Note Added: 84983
2026-06-03 13:34 tibor.pacalat Bug heat 0 => 2