This security advisory describes one low risk vulnerability.
CWE-200 - Information Exposure
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to Special:Redirect allows information disclosure of suppressed usernames via a User ID Lookup. A remote non-authenticated attacker can gain unauthorized access to sensitive information.Mitigation
Install updates from vendor's website.Vulnerable software versions
MediaWiki: 1.31.0, 1.31.1, 1.31.2, 1.31.3, 1.32.0, 1.32.1, 1.32.2, 1.32.3, 1.33.0CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.