{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/products/flex-objects-plugin-1.4.0-through-1.4.7/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.7,"id":"CVE-2026-56707"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Flex Objects plugin (1.4.0 through 1.4.7)"],"_cs_severities":["high"],"_cs_tags":["web-security","cms","data-exposure"],"_cs_type":"advisory","_cs_vendors":["GetGrav"],"content_html":"\u003cp\u003eGrav Flex Objects plugin versions 1.4.0 through 1.4.7 are susceptible to an authorization bypass vulnerability (CVE-2026-56707) due to inadequate access control checks within the \u003ccode\u003eflex-objects\u003c/code\u003e shortcode functionality. The vulnerability enables an authenticated user who possesses basic page-edit access to invoke and render registered Flex collections that should otherwise be restricted by the administrative Access Control List (ACL). By embedding these shortcodes into published pages, an attacker can force the application to disclose sensitive directory contents, including internal user account metadata. This flaw essentially circumvents the intended security posture of the CMS admin panel, allowing for unauthorized data exposure by leveraging legitimate administrative shortcode features against the system.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains or authenticates as a user with page-editing privileges within the Grav CMS environment.\u003c/li\u003e\n\u003cli\u003eAttacker identifies the target Flex collection identifiers through reconnaissance of the site structure or documentation.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious page containing the vulnerable \u003ccode\u003eflex-objects\u003c/code\u003e shortcode targeting the restricted collection.\u003c/li\u003e\n\u003cli\u003eAttacker publishes or saves the page, triggering the server-side rendering of the specified collection.\u003c/li\u003e\n\u003cli\u003eThe plugin fails to perform an authorization check on the rendering request against the user's current session permissions.\u003c/li\u003e\n\u003cli\u003eThe application processes the shortcode and populates the page with the contents of the sensitive Flex collection.\u003c/li\u003e\n\u003cli\u003eAttacker views the rendered page to scrape or exfiltrate the returned sensitive user data or system information.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation allows for the unauthorized disclosure of sensitive system data and user account information. Given the nature of the information stored in Flex collections (often utilized for core configuration or user management), this could lead to a significant privacy breach or facilitate further lateral movement or privilege escalation within the Grav CMS environment.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cp\u003ePrioritize the immediate update of the Grav Flex Objects plugin to version 1.4.8 or later to remediate CVE-2026-56707. Audit existing CMS pages for the inclusion of \u003ccode\u003eflex-objects\u003c/code\u003e shortcodes to identify unauthorized data collection points. Review access logs for webserver requests (cs-uri-stem) associated with page-edit actions followed by excessive data retrieval from Flex collection endpoints.\u003c/p\u003e\n","date_modified":"2026-08-25T04:06:07Z","date_published":"2026-08-25T04:06:07Z","id":"https://feed.craftedsignal.io/briefs/2026-08-grav-flex-objects/","summary":"An authorization bypass vulnerability (CVE-2026-56707) in Grav Flex Objects plugin versions 1.4.0 through 1.4.7 allows authenticated users with page-edit privileges to exfiltrate sensitive data by rendering unauthorized Flex collections via shortcodes.","title":"Authorization Bypass in Grav Flex Objects Plugin","url":"https://feed.craftedsignal.io/briefs/2026-08-grav-flex-objects/"}],"language":"en","title":"CraftedSignal Threat Feed - Flex Objects Plugin (1.4.0 Through 1.4.7)","version":"https://jsonfeed.org/version/1.1"}