@tryghost/activitypub is Ghost’s social/federation client app. Prior to 3.1.0, the ActivityPub client in Ghost was vulnerable to JavaScript…
GitHub_M·CWE-79·Published 2026-06-24
@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.
@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.
### Impact The ActivityPub client in Ghost was vulnerable to JavaScript injection on posts shared by a maliciously customised ActivityPub server. ### Vulnerable Versions This vulnerability is present in the @tryghost/activitypub package up to v3.0.8. All prior versions are also affected. ### Patches @tryghost/activitypub v3.1.0 contains a fix for this issue and is also automatically fetched by Ghost. ### References Ghost thanks Brad Geesaman, Ghost Security for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email Ghost at [[email protected]](mailto:[email protected]).
| Version | Type | Source | Base | Exp | Impact | Vector |
|---|---|---|---|---|---|---|
| 3.1 | Primary | cve.org | 7.5 | — | — | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | Primary | cve.org | 7.5 | — | — | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | Secondary | NVD | 7.5 | 1.6 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | Secondary | ENISA EUVD | 7.5 | — | — | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 3.1 | Secondary | GHSA | 7.5 | — | — | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |