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Information disclosure in MediaWiki

Published: 2019-10-19
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-16738
Exploitation vector Network
Public exploit N/A
Vulnerable software
Web applications / CMS


Security Advisory

This security advisory describes one low risk vulnerability.

1) Information disclosure

Severity: Low

CVSSv3: 4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-16738

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


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.


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, 1.33.0

CPE External links

Q & A

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.

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