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CVE-2026-53950

@tryghost/activitypub: XSS in Ghost's ActivityPub client

CVSS 7.5 HIGHEPSS 0.2%CWE-79
@tryghost/activitypub is Ghost’s social/federation client app. Prior to 3.1.0, the ActivityPub client in Ghost was vulnerable to JavaScript injection on posts shared by a maliciously customised ActivityPub server. This vulnerability is fixed in 3.1.0.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
TryGhost · Ghost

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