CVE-2026-44977 Countly CVE debrief

Who should care

Countly administrators, especially those with non-global administrator roles, and security teams responsible for monitoring and protecting analytics solutions should assess exposure and prioritize remediation.

Why it matters

CVE-2026-44977 is a critical vulnerability in Countly's countly-server component that allows non-global administrators to store and potentially execute active content, impacting global administrators who preview the content. This issue requires immediate attention, especially for environments with untrusted administrators or where global administrators may access the preview feature.

• Potential exposure of authenticated session capabilities
• Possible execution of attacker-controlled code within the Countly origin
• Risk of unauthorized access or data manipulation
• Need for verification of current version and exposure

Technical summary

The countly-server, part of the Countly product analytics solution, is vulnerable to active content execution. A non-global application administrator can use the uploadFeedbackFile feature to store attacker-controlled content. When a global administrator previews this content, the payload is executed within the Countly origin, potentially exposing authenticated session capabilities, including auth_token and csrf_token values.

Defensive priority

High priority remediation is recommended for Countly instances with untrusted administrators or where global administrators may access the preview feature.

Recommended defensive actions

• Upgrade to version 24.05.50 or 25.03.44 or later
• Restrict access to the preview feature for non-global administrators
• Monitor for suspicious activity related to the star-rating plugin
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its critical CVSS score of 9 and the affected versions. However, specific details about exploitation or victim impact are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.