What’s Vulnerable › Vulnerabilities

CVE-2024-43201: Planet Fitness Workouts mobile apps do not properly validate TLS certificates

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-09-23 · updated 2026-06-17
• Weakness: CWE-295

Description

The Planet Fitness Workouts iOS and Android mobile apps fail to properly validate TLS certificates, allowing an attacker with appropriate network access to obtain session tokens and sensitive information. Planet Fitness first addressed this vulnerability in version 9.8.12 (released on 2024-07-25) and more recently in version 9.9.13 (released on 2025-02-11).

Affected products

• Planet Fitness Workouts: before 9.8.12 — fixed in 9.8.12

How to fix

Upgrade to a fixed version: Planet Fitness Workouts 9.8.12. Check the vendor advisory for mitigations.

References

• https://apps.apple.com/us/app/planet-fitness-workouts/id399857015
• https://dontvacuum.me/bugs/pf/

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