countly-server: Stored XSS in feedback upload enables app-admin to compromise global admin session context

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-44977
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-16 16:17:44 UTC
Updated2026-10-21 03:17:19 UTC
Descriptioncountly-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.

Risk And Classification

Primary CVSS: v3.1 9 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
3.1CNADECLARED9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Countly Countly-server affected < 24.05.50 Not specified
CNA Countly Countly-server affected >= 25.03, < 25.03.44 Not specified

References

ReferenceSourceLinkTags
github.com/Countly/countly-server/releases/tag/24.05.50 [email protected] github.com
github.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a2... [email protected] github.com
github.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc5... [email protected] github.com
github.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/Countly/countly-server/releases/tag/25.03.44 [email protected] github.com
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