CVE-2026-53950CWE-79

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

High · published June 24, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
27.7
In the wild
Unconfirmed
What it is

@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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00352 · 27.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-24T18:04Z
EPSS history
Timeline
  • 24 JUN 18:04Z
    @tryghost/activitypub: XSS in Ghost's ActivityPub client
    cvelistv5