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GHSA-gv6q-2m97-882h

HighCVSS 8.8 / 10
Published Jan 28, 2026·Last modified Feb 3, 2026
Affected Components(0)

No affected components available

Description

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.

Risk Scores
Base Score
8.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
8.1

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.26%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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