The CentralNotice extension for MediaWiki before 1.19.9, 1.20.x before 1.20.8, and 1.21.x before 1.21.3 sets the Cache-Control header to cache session cookies when a user is autocreated, which allows remote attackers to authenticate as the created user.
| Software | From | Fixed in |
|---|---|---|
| mediawiki / mediawiki | 1.21 | 1.21.3 |
| mediawiki / mediawiki | 1.20 | 1.20.8 |
| mediawiki / mediawiki | - | 1.19.9 |
| fedoraproject / fedora | 18 | 18.x |
| fedoraproject / fedora | 19 | 19.x |