CVE-2021-31590 Auth bypass in n/a
Attackers retain admin privileges via stale JWTs after downgrade or deletion, allowing unauthorized access to the administration panel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-31590?
CVE-2021-31590 is a high-severity authentication bypass vulnerability in n/a, published on 19 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
PwnDoc all versions until 0.4.0 (2021-08-23) has incorrect JSON Webtoken handling, leading to incorrect access control. With a valid JSON Webtoken that is used for authentication and authorization, a user can keep his admin privileges even if he is downgraded to the "user" privilege. Even after a user's account is deleted, the user can still access the administration panel (and add or delete users) and has complete access to the system.
Which versions are affected by CVE-2021-31590?
It affects 1 product.
Products include Pwndoc Project Pwndoc.
How do I fix CVE-2021-31590?
No fix has been published for CVE-2021-31590 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-2021-31590 being exploited?
There is no known exploitation of CVE-2021-31590 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2022-45771 File upload in n/a
- CVE-2024-55602 PenDoc vulnerable to Arbitrary File Read on updating and downloading templates using Path Traversal
- CVE-2025-23044 Cross-Site Request Forgery (CSRF) allows creating admin account with POST request
- CVE-2025-27410 PwnDoc Arbitrary File Write to RCE using Path Traversal in backup restore as admin
- CVE-2025-27413 PwnDoc Arbitrary File Write to RCE using Path Traversal in template update from backup templates.json
Sources
Also known as GHSA-w9w2-pj3m-5v3r.