CVE-2026-53950
@tryghost/activitypub: XSS in Ghost's ActivityPub client
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
@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.
| CWE | CWE-79 |
| Vendor | tryghost |
| Product | ghost |
| Published | Jun 24, 2026 |
| Last Updated | Jun 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
TryGhost / Ghost
< 3.1.0