CVE-2023-36462
Medium
Description
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual link. This can still be used for phishing, though, similar to IDN homograph attacks. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.
SeverityMedium
CVSS5.4
Exploit probability—
Product
Mastodon
PublishedJul 6, 2023
First seenJul 6, 2023
Weakness typeCWE-20Improper input validation
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 | 2.6.0 ≤ 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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