HIGH 7.1 NVD
CVE-2026-77939
Flextype CMS through v1.0.0-dev contains an expression language injection vulnerability that allows authenticated attackers with a valid API token to read arbit
Flextype CMS through v1.0.0-dev contains an expression language injection vulnerability that allows authenticated attackers with a valid API token to read arbitrary files by passing unsanitized user-supplied input to the Symfony ExpressionLanguage engine via the POST /api/v1/query endpoint. Attackers can leverage exposed application objects including filesystem() and serializers() within the evaluation scope to read arbitrary server files and achieve conditional remote code execution if a PHP file can be placed on disk through a secondary vector.
References
- https://github.com/flextype/flextype/issues/595
- https://www.vulncheck.com/advisories/flextype-cms-dev-rce-via-post-api-v1-query-endpoint
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-08-28 via NVD.
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