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.
References6
- github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859…
- github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9…
- github.com/Countly/countly-server/releases/tag/24.05.50
- github.com/Countly/countly-server/releases/tag/25.03.44
- github.com/Countly/countly-server/security/advisories/GHSA-jqp4…
- github.com/Countly/countly-server/security/advisories/GHSA-jqp4…
Metrics
- CVSS 3.1
-
9.0
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 38 · as of 10 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
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