| Package | Affected versions | Patched versions |
|---|---|---|
| mediawiki | ≥ 1.20, < 1.20.8≥ 1.21, < 1.21.3< 1.19.9 | 1.20.81.21.31.19.9 |
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.
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