CVE-2026-113711 ApostropheCMS - Authentication Bypass

ApostropheCMS prior to 4.33.0 and import-export module prior to 3.7.0 contain an authorization bypass caused by missing early authorize callback in bigUploadMiddleware, letting unauthenticated attackers perform upload initialization and cleanup, exploit requires unauthenticated access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-400

Vendor fix

Upgrade ApostropheCMS to 4.33.0 and import-export module to 3.7.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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