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High

Ghost vulnerable to XSS via malicious Portal preview links

  • Disclosed: 28.01.2026
  • Updated: 11.10.2026 10:22

Impact

An attacker was able to craft a malicious link that, when accessed by an authenticated staff user or member, would execute JavaScript with the victim's permissions, potentially leading to account takeover.

Vulnerable versions

This vulnerability is present in Ghost versions:

  • v5.43.0 to v5.120.4
  • v6.0.0 to v6.14.0

As well as in Portal versions:

  • v2.29.1 to v2.51.4
  • v2.52.0 to v2.57.0

Patches

Ghost automatically loads the latest patch of the members Portal component via CDN. Therefore:

  • For Ghost 5.x users, upgrading to v5.121.0 or later fixes the vulnerability (loads Portal v2.51.5, which contains the patch)
  • For Ghost 6.x users, upgrading to v6.15.0 or later fixes the vulnerability (loads Portal v2.57.1, which contains the patch)

For Ghost installations using a customised or self-hosted version of Portal, it will be necessary to manually rebuild from or update to the latest patch version.

References

Ghost thanks Younes Belalia for discovering and disclosing this vulnerability responsibly.

For more information

If users have any questions or comments about this advisory, email Ghost at security@ghost.org.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package ghost >= 5.43.0, < 5.121.0, >= 6.0.0, < 6.15.0 5.121.0, 6.15.0
npm package @tryghost/portal >= 2.29.1, < 2.51.5, >= 2.52.0, < 2.57.1 2.51.5, 2.57.1

References

CVSS score 8.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-79
Platform
npm
Package
ghost, @tryghost/portal
Disclosed
28.01.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-gv6q-2m97-882h - CC BY 4.0

Vulnerability history: ghost

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (61) in the archive
Total entries
61
First → latest
04.2021 10.2026
Without a fix
3
Exploited in attacks
0

Severity breakdown

  • Critical 4
  • High 16
  • Medium 38
  • Low 3

Disclosures per year

Severity:
  1. Ghost: Remote Code Execution via Bookmark Card Images
    High · 8.8 CVE-2026-105642 >= 6.56.0, < 6.67.0 6.67.0
  2. Ghost: Stored XSS via Embed Card Previews
    High · 7.3 CVE-2026-105643 >= 6.34.0, < 6.67.0 6.67.0
  3. Ghost: Stored XSS via SVG Uploads Bypassing Sanitization
    High · 7.3 CVE-2026-105649 >= 4.22.0, < 6.65.0 6.65.0
  4. Ghost: Stored XSS via oEmbed Photo Responses
    High · 8.1 CVE-2026-104414 >= 2.5.0, < 6.64.0 6.64.0
  5. Ghost: Stored XSS via Bookmark Card Images
    High · 7.3 CVE-2026-104413 >= 5.94.0, < 6.64.0 6.64.0
  6. Ghost: Invite Token Disclosure in Ghost Admin API
    High · 7.5 CVE-2026-104416 >= 4.39.0, < 6.64.0 6.64.0
  7. Ghost: Remote Code Execution via Theme Translation Files
    High · 7.2 CVE-2026-104418 >= 6.10.3, < 6.64.0 6.64.0
  8. Ghost: Stored XSS via File Uploads on Local Storage
    High · 7.3 CVE-2026-104411 >= 6.22.1, < 6.64.0 6.64.0
  9. Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header
    Critical · 9.6 CVE-2026-53943 >= 4.0.0, < 6.37.0 6.37.0
  10. Ghost has incomplete CSRF protections around OTC use
    High · 7.5 CVE-2026-29784 >= 5.101.6, < 6.19.3 6.19.3
  11. Ghost Vulnerable to Remote Code Execution via Malicious Themes
    High · 7.6 CVE-2026-29053 >= 0.7.2, < 6.19.1 6.19.1
  12. Ghost has a SQL injection in Content API
    Critical · 9.4 CVE-2026-26980 >= 3.24.0, < 6.19.1 6.19.1
  13. Ghost vulnerable to XSS via malicious Portal preview links this entry
    High · 8.8 CVE-2026-24778 >= 5.43.0, < 5.121.0, >= 6.0.0, < 6.15.0 5.121.0, 6.15.0
  14. Ghost has Staff Token permission bypass
    High · 8.1 CVE-2026-22595 >= 6.0.0, < 6.11.0, >= 5.105.0, < 5.130.6 6.11.0, 5.130.6
  15. Ghost has Staff 2FA bypass
    High · 8.1 CVE-2026-22594 >= 6.0.0, < 6.11.0, >= 5.105.0, < 5.130.6 6.11.0, 5.130.6
  16. Path Traversal in Ghost
    High · 7.5 CVE-2023-32235 < 5.42.1 5.42.1
  17. Ghost vulnerable to information disclosure of private API fields
    High · 7.5 CVE-2023-31133 < 5.46.1 5.46.1
  18. ghost vulnerable to unauthorized newsletter modification via improper access controls
    High · 8.5 CVE-2022-41654 >= 5.0.0, < 5.22.7, >= 4.46.0, < 4.48.8 5.22.7, 4.48.8
  19. Arbitrary file upload in Ghost
    Critical · 9.8 CVE-2022-27139 <= 4.39.0 no fix
  20. Arbitrary file upload in Ghost
    Critical · 9.8 CVE-2022-28397 <= 4.42.0 no fix

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