CVE-2020-7925 Denial of Service when processing malformed Role names
An unauthenticated attacker can cause a denial of service in MongoDB Server by sending a specially crafted request with a malformed role name.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-7925?
CVE-2020-7925 is a high-severity denial of service vulnerability in Mongodb Mongodb, published on 23 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect validation of user input in the role name parser may lead to use of uninitialized memory allowing an unauthenticated attacker to use a specially crafted request to cause a denial of service. This issue affects MongoDB Server v4.4 versions prior to 4.4.0-rc12; MongoDB Server v4.2 versions prior to 4.2.9.
Which versions are affected by CVE-2020-7925?
1 open source package ship an affected version, including mongodb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mongodb Bitnami | From 4.2.0 | 4.2.9 |
Products include Mongodb Mongodb.
How do I fix CVE-2020-7925?
Upgrade mongodb to 4.2.9 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-7925 being exploited?
There is no known exploitation of CVE-2020-7925 in the wild and no public exploit code.
Other vulnerabilities in Mongodb Mongodb
- CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency
- CVE-2026-82067 Auth bypass in MongoDB Server
- CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption
- CVE-2017-15535 Denial of service in n/a
- CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
Sources
Also known as BIT-mongodb-2020-7925, GHSA-v8v4-4v92-48h2.