CVE-2021-47986 parse-community CVE debrief

Who should care

Organizations using Parse Server, especially those with unreviewed code in personal forks, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing and updating dependency declarations, monitoring for suspicious activity related to version tags, and prioritizing upgrades to a patched version of Parse Server. Security teams and vulnerability management teams should also be aware of the potential impact of this vulnerability on their systems and take steps to mitigate it. Additionally, operators and platform administrators should review the affected scope and severity of this vulnerability and plan for vendor-supported updates or mitigations through normal change control where exposure is confirmed. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified. Monitoring, detection, and logs for exposed assets should be checked for extra review. Exceptions, retested remediated assets, and closed items should be tracked only after evidence is documented. Asset inventory and source tracking should also be considered in response to this vulnerability. Rollback/change windows may be necessary for some organizations to ensure proper mitigation of this vulnerability. The CVE-2021-47986 record indicates a supply chain vulnerability in Parse Server before version 4.10.0, where incorrect version tags were pushed to the repository, potentially linking to unreviewed code in a personal fork. Attackers could exploit this by specifying affected version tags in dependency declarations to execute unreviewed and potentially malicious code. The NVD entry is currently Analyzed. The CVE record was published on 2026-06-25T22:16:58.210Z and has not been modified since then. The CVSS score is 7.7 and is considered HIGH severity. The official CVE record and NVD detail page provide additional information on this vulnerability. A vendor advisory and third-party advisory are also available for this vulnerability. The CVSS score and severity of this vulnerability highlight the importance of prioritizing mitigation efforts. The potential for code execution and malicious activity makes this vulnerability a high-pri

Technical summary

CVE-2021-47986 is a supply chain vulnerability in Parse Server before version 4.10.0. The vulnerability arises from incorrect version tags pushed to the repository, potentially linking to unreviewed code in a personal fork. Attackers can exploit this by specifying affected version tags in dependency declarations to execute unreviewed and potentially malicious code. This could lead to code execution and potentially malicious activity. Organizations using Parse Server versions prior to 4.10.0 should prioritize upgrading to a patched version to prevent potential code execution via malicious version tags.

Defensive priority

Organizations using Parse Server versions prior to 4.10.0 should prioritize upgrading to a patched version to prevent potential code execution via malicious version tags.

Recommended defensive actions

• Upgrade to Parse Server version 4.10.0 or later
• Review and update dependency declarations to prevent exploitation
• Monitor for suspicious activity related to version tags
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE-2021-47986 record indicates a supply chain vulnerability in Parse Server before version 4.10.0, where incorrect version tags were pushed to the repository, potentially linking to unreviewed code in a personal fork. Attackers could exploit this by specifying affected version tags in dependency declarations to execute unreviewed and potentially malicious code.

Official resources