Bypass of fix for CVE-2020-15247, Twig sandbox escape
Description
October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. A bypass of CVE-2020-15247 (fixed in 1.0.469 and 1.1.0) was discovered that has the same impact as 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 470 (v1.0.470) and v1.1.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
october/cmsPackagist | >= 1.0.469, < 1.0.470 | 1.0.470 |
Affected products
2- Range: = 1.0.469
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-94vp-rmqv-5875ghsaADVISORY
- github.com/advisories/GHSA-r89v-cgv7-3jhxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-26231ghsaADVISORY
- github.com/octobercms/october/commit/d34fb8ab51108495a9a651b841202d935f4e12f7ghsax_refsource_MISCWEB
- github.com/octobercms/october/security/advisories/GHSA-r89v-cgv7-3jhxghsax_refsource_CONFIRMWEB
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