CVE-2021-47987 Parse Server - Arbitrary Code Execution via Malicious Version Tags
Attackers could inject malicious code into Parse Server projects using specific git-based dependencies due to unreviewed version tags.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-47987?
CVE-2021-47987 is a high-severity vulnerability in parse-community parse-server, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Parse Server before 4.10.0 was affected by a supply chain incident in which incorrect version tags were pushed to the official repository pointing to an unreviewed personal fork of a contributor with write access. No releases were published with these tags; a project was exposed only if it defined a git-based dependency referencing one of the affected tags (for example, parse-server#4.9.3). The code behind the tags was not reviewed or approved, and although no malicious code was identified, the introduction of security vulnerabilities could not be ruled out.
Weakness: CWE-494
Which versions are affected by CVE-2021-47987?
How do I fix CVE-2021-47987?
Upgrade to a fixed version.
Is CVE-2021-47987 being exploited?
There is no known exploitation of CVE-2021-47987 in the wild and no public exploit code.
Sources
Also known as GHSA-h6qh-8r3c-pc9v.