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CVE-2026-44977

countly-server is the server-side part of Countly, a product analytics solution

Risk score
59/100
CVSS
9.0 v3.1
Exploit chance (30 days)
0.3%
Published
16 Oct 2026

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What to know

What it is
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/…
Affected
See advisory
Fix
Upgrade the product to 24.05.50 or 25.03.44 (whichever matches your release line), or later.
Exploitation
No known exploitation

Why it is Yellow

  • CVSS 9.0 critical

References

Original 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.

Last activity 16 Oct 2026. Patch Forecast updates every hour.