CVE-2020-20294: An issue was found in CMSWing project version 1.3.8

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-20294 is a critical-severity flaw (CVSS 9.8) affecting cmswing. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was found in CMSWing project version 1.3.8. Because the log function does not check the log parameter, malicious parameters can execute arbitrary commands.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-02-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cmswing

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

Am I affected?

Timeline

2021-02-01 18:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

cmswing cmswing DOWNGRADE

Affected: 1.3.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.8 (Debian / Ubuntu)

apt-cache madison cmswing sudo apt install cmswing=<VERSION_BEFORE_1.3.8> sudo apt-mark hold cmswing

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

dnf --showduplicates list cmswing sudo dnf downgrade cmswing-<VERSION_BEFORE_1.3.8> sudo dnf versionlock add cmswing

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-2020-20294?

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

Is CVE-2020-20294 being exploited?

CVE-2020-20294 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-2020-20294 affect?

CVE-2020-20294 affects cmswing. Severity is critical (CVSS 9.8). An issue was found in CMSWing project version 1.3.8. Because the log function does not check the log parameter, malicious parameters can execute arbitrary commands.

How urgent is CVE-2020-20294?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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CVE-2020-24992 MEDIUM 5.4 DOWNGRADE There is a cross site scripting vulnerability on CmsWing 1.3.7
CVE-2020-20296 CRITICAL 9.8 DOWNGRADE An issue was found in CMSWing project version 1.3.8, Because the rechargeAction function does not check the ba

References

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