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ApostropheCMS CVE-2026-63667

| EUVDEUVD-2026-60441 MEDIUM
Path Traversal (CWE-22)
2026-08-17 GitHub_M
6.5
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Import endpoint is network-accessible requiring only contributor credentials (PR:L); confidentiality is high as files are published publicly; no integrity or availability impact applies.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Patch available
Aug 17, 2026 - 21:17 EUVD
Source Code Evidence Fetched
Aug 17, 2026 - 20:36 vuln.today
Analysis Generated
Aug 17, 2026 - 20:36 vuln.today

DescriptionCVE.org

ApostropheCMS is an open-source Node.js content management system. Prior to 3.6.2, the import-export module in packages/import-export/lib/formats/gzip.js constructs an attachment source path from the attacker-controlled _id, name, and extension fields in aposAttachments.json without ensuring that the resolved path remains under the extracted attachments directory, allowing an authenticated contributor to import a crafted archive, read a host file with an allowed extension, and publish the copied file at an unauthenticated uploads URL. This issue is fixed in version 3.6.2.

AnalysisAI

Path traversal in ApostropheCMS's import-export module (versions prior to 3.6.2) allows an authenticated contributor to exfiltrate host files and expose them publicly via the CMS uploads URL. By importing a crafted .tar.gz archive with ../ sequences embedded in the _id, name, or extension fields of aposAttachments.json, an attacker causes the module to reconstruct a source path that escapes the extraction directory, reading any host file whose name ends with an allow-listed extension and copying it to a publicly accessible, unauthenticated uploads endpoint. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated account with at least the contributor role on the target ApostropheCMS instance - unauthenticated access is not sufficient. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD CVSS vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N scores 6.5 and is well-calibrated for this vulnerability: network-accessible exploitation by a contributor-level authenticated user with no additional complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade the `@apostrophecms/import-export` package to version 3.6.2 or later, which resolves the traversal by enforcing string-type validation on `_id`, `name`, and `extension` fields and adding a `path.resolve().startsWith()` boundary check before any attachment source path is accessed. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-63667 vulnerability details – vuln.today

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