MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2, when a private wiki is configured, provides different error messages for failed login attempts depending on whether the username exists, which allows remote attackers to enumerate account names and conduct brute-force attacks via a series of requests.
[
{
"product": "MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2"
}
]
}
]