---
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'
---

## Overview

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.

## Affected

- `countly-server < 24.05.50`
- `countly-server >= 25.03, < 25.03.44`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.