{"id":"CVE-2026-44977","title":"countly-server: Stored XSS in feedback upload enables app-admin to compromise global admin session context","summary":"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-con…","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-79"],"vendor":"Countly","product":"countly-server","affected":["countly-server < 24.05.50","countly-server >= 25.03, < 25.03.44"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T16:04:45.868Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44977","references":[{"url":"https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc","label":"https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc"},{"url":"https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631","label":"https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631"},{"url":"https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41","label":"https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41"},{"url":"https://github.com/Countly/countly-server/releases/tag/24.05.50","label":"https://github.com/Countly/countly-server/releases/tag/24.05.50"},{"url":"https://github.com/Countly/countly-server/releases/tag/25.03.44","label":"https://github.com/Countly/countly-server/releases/tag/25.03.44"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T17:24:46.884Z","slug":"CVE-2026-44977","body":"## Overview\n\ncountly-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.\n\n## Affected\n\n- `countly-server < 24.05.50`\n- `countly-server >= 25.03, < 25.03.44`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":49.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}