CVE-2020-23283: Information disclosure in Logon Page in MV's mConnect application v02.001.00 allows an attacker to know valid

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-23283 is a high-severity flaw (CVSS 7.5) affecting mconnect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Information disclosure in Logon Page in MV's mConnect application v02.001.00 allows an attacker to know valid users from the application's database via brute force.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-307
Published	2021-07-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mv

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-21 15:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

mv mconnect DOWNGRADE

Affected: 02.001.00 · 2013.1.6.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 02.001.00

1. Check installed version

apt-cache policy mconnect || rpm -q mconnect || mconnect --version

2. No fixed release: DOWNGRADE to a release before 02.001.00 (Debian / Ubuntu)

apt-cache madison mconnect sudo apt install mconnect=<VERSION_BEFORE_02.001.00> sudo apt-mark hold mconnect

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mconnect sudo dnf downgrade mconnect-<VERSION_BEFORE_02.001.00> sudo dnf versionlock add mconnect

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-23283?

mconnect: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-23283 being exploited?

CVE-2020-23283 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-23283 affect?

CVE-2020-23283 affects mconnect. Severity is high (CVSS 7.5). Information disclosure in Logon Page in MV's mConnect application v02.001.00 allows an attacker to know valid users from the application's database via brute force.

How urgent is CVE-2020-23283?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-23282 HIGH 7.5 DOWNGRADE SQL injection in Logon Page in MV's mConnect application, v02.001.00, allows an attacker to use a non existing

References

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