CVE-2023-36462: 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…

PriorityP428medium5.4CVSS 3.1

AVNACLPRNUIRSUCLILAN

EPSS

0.53%

40.6th percentile

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
joinmastodon	mastodon	>= 2.6.0 < 3.5.9	3.5.9
joinmastodon	mastodon	>= 4.0.0 < 4.0.5	4.0.5
joinmastodon	mastodon	>= 4.1.0 < 4.1.3	4.1.3
mastodon	mastodon	—	—
mastodon	mastodon	—	—
mastodon	mastodon	—	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.