CVE-2026-53950

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

Published Jun 24, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
@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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xpp7-93x6-v29m XSS in Ghost's ActivityPub client
History
Type Values Removed Values Added
First Time appeared Ghost
Ghost ghost
Vendors & Products Ghost
Ghost ghost
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description @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.
Title @tryghost/activitypub: XSS in Ghost's ActivityPub client
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 24, 2026, 6:49 PM
Reserved
Jun 11, 2026, 3:50 PM
Status
Deferred
Published
Jun 24, 2026, 7:17 PM
Modified
Oct 25, 2026, 10:10 PM