CVE-2021-29484
Scores
EPSS
Percentile: 57.0%
CVSS
CVSS Score: 6.1/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
Required (R)
Captures the requirement for a human user participation
Scope
Changed (C)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
Low (L)
Measures the impact to the confidentiality of information
Integrity Impact
Low (L)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Medium
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
None (N)
Measures the impact to the availability of the impacted component
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.
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Sources
CWEs
Vulnerable Software (2)
Type: Configuration
Product: ghost
Operating System: debian
{ "unfixed": true}
Source: debian
Type: Configuration
Vendor: *
Product: ghost
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "4.3.3", "versionStartIncluding": "4.0.0", "vulnerable": true } ...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "4.3.3", "versionStartIncluding": "4.0.0", "vulnerable": true } ], "operator": "OR"}
Source: nvd