CVE-2026-44977
CVE-2026-44977 · countly-server: Stored XSS in feedback upload enables app-admin to compromise global admin session context
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.0 · Critical · EPSS 0.3%
- Published
- Updated
Affected products and versions
countly-server
- Versions
- < 24.05.50: Affected
- >= 25.03, < 25.03.44: Affected
No fix published
Original sources
- https://github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc
- https://github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631
- https://github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41
- https://github.com/Countly/countly-server/releases/tag/24.05.50
- https://github.com/Countly/countly-server/releases/tag/25.03.44
- https://nvd.nist.gov/vuln/detail/CVE-2026-44977