Security readout for executives and security teams
Plain-English summary
Ghost sites running vulnerable 4.x releases let any logged-in user, even a contributor, see administrator-level API keys. That can turn a low-privilege CMS account into broader administrative access. The issue is fixed in Ghost 4.10.0, and exposed API keys should be regenerated after remediation.
Executive priority
Treat as a timely remediation item for any affected Ghost site with multiple users. It is not evidenced as actively exploited, but compromised admin API keys can create lasting account and content-management risk.
Technical view
CVE-2021-39192 is a Ghost limits-service authorization flaw in versions 4.0.0 through 4.9.4. Authenticated non-admin users could access admin-level API keys through the integrations API endpoint. The CVSS score is 6.5, with high confidentiality and integrity impact, no user interaction, and high privileges required.
Likely exposure
Exposure is limited to Ghost deployments on versions >= 4.0.0 and < 4.10.0 with any non-Administrator authenticated accounts. Contributor accounts are specifically named as able to reach the affected data.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV. Abuse requires an authenticated Ghost account, but the impact is serious because leaked admin API keys can enable privilege escalation.
Researcher notes
Focus validation on version range, authenticated role exposure, key rotation evidence, and whether contributor or other non-admin accounts had access before patching. Avoid assuming compromise without logs or other supporting evidence.
Mitigation direction
- Upgrade Ghost to version 4.10.0 or later.
- Regenerate all API keys after patching.
- If patching is delayed, disable all non-Administrator accounts.
- Review Ghost vendor guidance before applying other mitigations.
Validation and detection
- Inventory Ghost instances and confirm versions are not below 4.10.0.
- Check whether non-Administrator accounts existed during the vulnerable period.
- Confirm all API keys were regenerated after remediation.
- Review available logs for non-admin integrations API access, if retained.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-39192 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N1.25.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-j5c2-hm46-wp5cCVE reference · x_refsource_CONFIRM
- https://github.com/TryGhost/Ghost/releases/tag/v4.10.0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.