CVE-2026-53950 - Vulnerability Details - OpenCVE

@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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

TryGhost

Ghost

affected

Version	Status	Constraints
`< 3.1.0`	affected	—

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/TryGhost/Ghost/security/advisories/GHSA-xpp7-93x6-v29m

History

Wed, 24 Jun 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 24 Jun 2026 18:45:00 +0000

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		https://github.com/TryGhost/Ghost/security/advisories/GHSA-xpp7-93x6-v29m
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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-24T18:04:25.695Z

Updated: 2026-06-24T18:49:55.010Z

Reserved: 2026-06-11T15:50:01.281Z

Link: CVE-2026-53950

Vulnrichment

Updated: 2026-06-24T18:49:52.457Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

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