What’s Vulnerable › Vulnerabilities

CVE-2020-25533

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-01-15 · updated 2026-06-17
• Weakness: CWE-362

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.

Affected products

• Malwarebytes: before 4.0 — fixed in 4.0

How to fix

Upgrade to a fixed version: Malwarebytes 4.0. Check the vendor advisory for mitigations.

References

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

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