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ApostropheCMS CVE-2026-63669

| EUVDEUVD-2026-60438 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
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:N/I:H/A:N
vuln.today AI
6.5 MEDIUM

REST API reachable over network with no special conditions; PR:L reflects mandatory editor/contributor authentication; I:H because attacker restructures restricted page hierarchy and triggers unchecked re-ranking of admin-only documents.

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

Lifecycle Timeline

3
Patch available
Aug 17, 2026 - 21:17 EUVD
Source Code Evidence Fetched
Aug 17, 2026 - 20:31 vuln.today
Analysis Generated
Aug 17, 2026 - 20:31 vuln.today

DescriptionCVE.org

ApostropheCMS is an open-source Node.js content management system. Prior to 4.32.0, the page module's move() operation fails to enforce the destination parent's _create permission because its oldParent archive condition disables the check for ordinary moves, allowing an authenticated editor or contributor to use _targetId and _position through the page REST update endpoint to move a controlled page into a restricted subtree and make nudgeNewPeers() updateMany re-rank protected sibling pages. This issue is fixed in version 4.32.0.

AnalysisAI

Integrity bypass in ApostropheCMS page management allows authenticated low-privileged editors to move pages into restricted subtrees they have no create rights over, and indirectly re-rank admin-only sibling pages via an unchecked database updateMany call. All deployments running ApostropheCMS prior to 4.32.0 are affected; the flaw exists in the REST page update endpoint and requires no special configuration to reach. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated CMS session with at minimum the editor or contributor role - unauthenticated access is not sufficient (CVSS PR:L confirms this). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N) accurately characterizes the attack profile: network-reachable REST endpoint, low complexity, no user interaction, but a mandatory low-privilege authenticated session. … 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 ApostropheCMS to version 4.32.0 or later, which restores destination-parent authorization enforcement in the page move() operation. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-63669 vulnerability details – vuln.today

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