CVE-2021-47663 Improper session handling
An unauthenticated attacker can guess session IDs due to weak JWT implementation, allowing user impersonation and full system access on Franka Emika robots.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47663?
CVE-2021-47663 is a high-severity authentication bypass vulnerability in Franka Emika Robot, published on 24 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Due to improper JSON Web Tokens implementation an unauthenticated remote attacker can guess a valid session ID and therefore impersonate a user to gain full access.
Weakness: CWE-613
Which versions are affected by CVE-2021-47663?
How do I fix CVE-2021-47663?
No fix has been published for CVE-2021-47663 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-47663 being exploited?
There is no known exploitation of CVE-2021-47663 in the wild and no public exploit code.
Sources
Also known as GHSA-wwjc-h7f8-cqv5.