CVE-2021-29484

Published on: 04/29/2021 12:00:00 AM UTC

Last Modified on: 04/30/2021 12:49:00 PM UTC

CVE-2021-29484 - advisory for GHSA-9fgx-q25h-jxrg

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Certain versions of Ghost from TryGhost contain the following vulnerability:

Ghost is a Node.js CMS. An unused endpoint added during the development of 4.0.0 has left sites vulnerable to untrusted users gaining access to Ghost Admin. Attackers can gain access by getting logged in users to click a link containing malicious code. Users do not need to enter credentials and may not know they've visited a malicious site. Ghost(Pro) has already been patched. We can find no evidence that the issue was exploited on Ghost(Pro) prior to the patch being added. Self-hosters are impacted if running Ghost a version between 4.0.0 and 4.3.2. Immediate action should be taken to secure your site. The issue has been fixed in 4.3.3, all 4.x sites should upgrade as soon as possible. As the endpoint is unused, the patch simply removes it. As a workaround blocking access to /ghost/preview can also mitigate the issue.

  • CVE-2021-29484 has been assigned by URL Logo [email protected] to track the vulnerability
  • Affected Vendor/Software: URL Logo TryGhost - Ghost version >= 4.0.0, < 4.3.3

CVE References

Description Tags Link
Critical security update available for Ghost 4.x - News - Ghost Forum forum.ghost.org
text/html
URL Logo MISC forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290
DOM XSS in Theme Preview · Advisory · TryGhost/Ghost · GitHub github.com
text/html
URL Logo CONFIRM github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg
ghost - npm www.npmjs.com
text/html
URL Logo MISC www.npmjs.com/package/ghost

Known Affected Software

Vendor Product Version
TryGhost Ghost >= 4.0.0, < 4.3.3

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-29484 : Ghost is a Node.js CMS. An unused endpoint added during the development of 4.0.0 has left sites vu… twitter.com/i/web/status/1… 2021-04-29 20:44:04
Reddit Logo Icon /r/netcve CVE-2021-29484 2021-04-29 21:44:59
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