CVE-2021-29484
Ghost (Cross-Site Request Forgery)
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.
INFO
Published Date :
April 29, 2021, 9:15 p.m.
Last Modified :
Sept. 14, 2021, 6:47 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
1.6
Public PoC/Exploit Available at Github
CVE-2021-29484 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-29484.
| URL | Resource |
|---|---|
| https://blog.sonarsource.com/ghost-admin-takeover | Exploit Third Party Advisory |
| https://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290 | Vendor Advisory |
| https://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg | Mitigation Third Party Advisory |
| https://www.npmjs.com/package/ghost | Product Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Automatic monitor github cve using Github Actions
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Python Shell Ruby
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29484 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29484 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Changed Reference Type https://blog.sonarsource.com/ghost-admin-takeover No Types Assigned https://blog.sonarsource.com/ghost-admin-takeover Exploit, Third Party Advisory Added CWE NIST CWE-79 -
CVE Modified by [email protected]
Sep. 06, 2021
Action Type Old Value New Value Changed 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. 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 Modified by [email protected]
Sep. 06, 2021
Action Type Old Value New Value Changed 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. 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. Removed Reference https://security.netapp.com/advisory/ntap-20210618-0006/ [No Types Assigned] Added Reference https://blog.sonarsource.com/ghost-admin-takeover [No Types Assigned] -
CVE Modified by [email protected]
Jun. 18, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210618-0006/ [No Types Assigned] -
Initial Analysis by [email protected]
May. 11, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290 No Types Assigned https://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290 Vendor Advisory Changed Reference Type https://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg No Types Assigned https://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrg Mitigation, Third Party Advisory Changed Reference Type https://www.npmjs.com/package/ghost No Types Assigned https://www.npmjs.com/package/ghost Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.3.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29484 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-29484
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2.51 }} 0.42%
score
0.90353
percentile