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CVE-2020-7921

20
FAUCET Score

CVE-2020-7921 describes an improper serialization vulnerability in MongoDB Server's authorization subsystem, affecting versions 3.6.x, 4.0.x, 4.2.x, and 4.3.x prior to their respective patched releases. This flaw allows an authenticated user to bypass IP whitelisting mechanisms after an administrative action. The vulnerability has a CVSS score of 5.3 (Medium), indicating a network-based attack with high complexity, requiring low privileges, and potentially leading to high integrity impact without affecting confidentiality or availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.6.0, < 3.6.18CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.15CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
>= 4.2.0, < 4.2.3CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
>= 4.3.0, < 4.3.3CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.6MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
47.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 37th percentile among its peer group of 1,425 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-mongodb34-mongodb
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-mongodb36-mongodb

Vendor Advisories (1)

redhatCVE-2020-7921Moderate

mongodb: Improper serialization permits bypass of IP based authentication restrictions

Jun 5, 2020

References

jira.mongodb.org / browse/SERVER-45472
PatchVendor Advisory