What’s Vulnerable › Vulnerabilities

CVE-2026-63667: ApostropheCMS: Arbitrary file read via import-export attachment-name path traversal

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-17 · updated 2026-10-23
• Weakness: CWE-22

Description

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.

Affected products

• apostrophecms apostrophe: before 3.6.2

References

• https://github.com/apostrophecms/apostrophe/commit/87cccf44a23d09420875ca8a3765eb3db843836a
• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3
• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-79qf-vqgc-7xx3

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