CVE-2021-21264: October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A bypass of CVE-2020-26231 (fixed in 1.0.470/471 and 1.1.1) was…

PriorityP425medium5.2CVSS 3.1

AVLACLPRHUIRSCCLILAL

EPSS

0.26%

17.5th percentile

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A bypass of CVE-2020-26231 (fixed in 1.0.470/471 and 1.1.1) was discovered that has the same impact as CVE-2020-26231 & CVE-2020-15247. An authenticated backend user with the `cms.manage_pages`, `cms.manage_layouts`, or `cms.manage_partials` permissions who would **normally** not be permitted to provide PHP code to be executed by the CMS due to `cms.enableSafeMode` being enabled is able to write specific Twig code to escape the Twig sandbox and execute arbitrary PHP. This is not a problem for anyone that trusts their users with those permissions to normally write & manage PHP within the CMS by not having `cms.enableSafeMode` enabled, but would be a problem for anyone relying on `cms.enableSafeMode` to ensure that users with those permissions in production do not have access to write & execute arbitrary PHP. Issue has been patched in Build 472 (v1.0.472) and v1.1.2. As a workaround, apply https://github.com/octobercms/october/commit/f63519ff1e8d375df30deba63156a2fc97aa9ee7 to your installation manually if unable to upgrade to Build 472 or v1.1.2.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
october	cms	>= 1.0.471 < 1.0.472	1.0.472
october	cms	>= 1.1.1 < 1.1.2	1.1.2
octobercms	october	<= 1.0.471	—
octobercms	october	1.1.0 – 1.1.1	—

CVSS provenance

nvdv3.15.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

nvdv2.04.4MEDIUMAV:L/AC:M/Au:N/C:P/I:P/A:P

ghsa5.2MEDIUM

osv5.2MEDIUM

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