MantisBT Vulnerable to Exposure of Sensitive Information to an Unauthorized Actor

If an issue references a note that belongs to another issue that the user doesn’t have access to, then it gets hyperlinked. Clicking on the link gives an access denied error as expected, yet some information remains available via the link, link label, and tooltip.

Impact

Disclosure of the following information:

• existence of the note
• note author name
• note creation timestamp
• issue id the note belongs to

Patches

See PR https://github.com/mantisbt/mantisbt/pull/2000

Workarounds

None

References

https://mantisbt.org/bugs/view.php?id=34434