Vulnerability · Published Jun 25, 2026 · Assigned by VulnCheck
CVE-2021-47987Parse Server - Arbitrary Code Execution via Malicious Version Tags
High 7.5
In plain English
A high-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | parse-server | 4.5.2 | GHSA-593v-wcqx-hq2w |
| npm | parse-server | 4.10.0 | GHSA-593v-wcqx-hq2w |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | 0 – before 4.10.0 |
Weakness: CWE-494 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-593v-wcqx-hq2w) vendor-advisory
- VulnCheck Advisory: Parse Server - Arbitrary Code Execution via Malicious Version Tags third-party-advisory