An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Mediawiki Checkuser
cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:*:*:*
|
— |
1.35.11
|
|
Mediawiki Checkuser
cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:*:*:*
|
1.36.0
|
1.38.7
|
|
Mediawiki Checkuser
cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:*:*:*
|
1.39.0
|
1.39.4
|