CVE-2026-77939 — Flextype CMS 1.0.0-dev RCE via POST /api/v1/query Endpoint
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 pas…
Published: 2026-08-28 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7