CVE-2023-36460
Critical
Description
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 3.5.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, attackers using carefully crafted media files can cause Mastodon's media processing code to create arbitrary files at any location. This allows attackers to create and overwrite any file Mastodon has access to, allowing Denial of Service and arbitrary Remote Code Execution. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.
SeverityCritical
CVSS9.9
Exploit probability—
Product
Mastodon
PublishedJul 6, 2023
First seenJul 6, 2023
Weakness typeCWE-22Path traversal
How to fix
Update
- joinmastodon mastodon3.5.9, 4.0.5, 4.1.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| joinmastodon mastodon | 3.5.0 ≤ v < 3.5.9, 4.0.0 ≤ v < 4.0.5, 4.1.0 ≤ v < 4.1.3 | 3.5.9, 4.0.5, 4.1.3 |
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