CVE-2021-29484

CVSS V2 Medium 4.3 CVSS V3 Medium 6.8
Description
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.
Overview
  • CVE ID
  • CVE-2021-29484
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-29T21:15:08
  • Last Modified Date
  • 2021-09-14T18:47:05
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:* 1 OR 4.0.0 4.3.3
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 6.8
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.6
  • Impact Score
  • 5.2
History
Created Old Value New Value Data Type Notes
2022-05-10 16:05:18 Added to TrackCVE
2022-12-05 01:21:20 2021-04-29T21:15Z 2021-04-29T21:15:08 CVE Published Date updated
2022-12-05 01:21:20 2021-09-14T18:47:05 CVE Modified Date updated
2022-12-05 01:21:20 Analyzed Vulnerability Status updated