{"id":"CVE-2026-44977","published":"2026-10-16T16:17:44.483","lastModified":"2026-10-16T20:02:37.630","description":"countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, plugins/star-rating/api/api.js allows a non-global application administrator to use uploadFeedbackFile to store attacker-controlled active content while trusting the supplied MIME type. plugins/star-rating/frontend/app.js publicly serves the stored content from feedback/preview/ with the attacker-influenced Content-Type, so a global administrator who opens the preview executes the payload in the Countly origin and exposes authenticated session capabilities, including auth_token and csrf_token values. This issue is fixed in versions 24.05.50 and 25.03.44.","cvssScore":9,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631","tags":[]},{"url":"https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41","tags":[]},{"url":"https://github.com/Countly/countly-server/releases/tag/24.05.50","tags":[]},{"url":"https://github.com/Countly/countly-server/releases/tag/25.03.44","tags":[]},{"url":"https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc","tags":[]}],"exploitRefs":[{"url":"https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631","tags":[]},{"url":"https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41","tags":[]},{"url":"https://github.com/Countly/countly-server/releases/tag/24.05.50","tags":[]},{"url":"https://github.com/Countly/countly-server/releases/tag/25.03.44","tags":[]},{"url":"https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc","tags":[]}],"hasPoc":true,"ai":{"summary":"A non-global administrator can upload malicious files that are later executed by a global administrator when previewing them, leading to remote code execution in the Countly context with full authenticated session access.","exploitability":"Moderately difficult to exploit as it requires both a non-global admin account and a global admin to view the malicious preview, but the attack chain is well-defined with public exploit references available.","blast_radius":"High impact across all Countly installations using the star-rating plugin, potentially allowing attackers to gain full administrative control over analytics data and user sessions.","remediation":"Upgrade to 24.05.50 or 25.03.44 immediately to patch the file upload vulnerability in the star-rating plugin.","detection":"Monitor for unusual file uploads to the feedback/preview/ directory with suspicious MIME types, and watch for global administrator sessions accessing preview URLs with unexpected content types in server logs.","tags":["xss","file-upload","web","authenticated"],"model":"garnet-coder","analyzedAt":"2026-10-17T08:49:25.759Z"}}