CVE-2020-18282: Cross-site scripting (XSS) vulnerability in NoneCms 1.3.0 allows remote attackers to inject arbitrary web scri

Routine

MEDIUM 6.1DOWNGRADE

CVE-2020-18282 is a medium-severity flaw (CVSS 6.1) affecting nonecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in NoneCms 1.3.0 allows remote attackers to inject arbitrary web script or HTML via feedback feature.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 5none

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

Am I affected?

Timeline

2023-05-08 14:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

5none nonecms DOWNGRADE

Affected: 1.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.0 (Debian / Ubuntu)

apt-cache madison nonecms sudo apt install nonecms=<VERSION_BEFORE_1.3.0> sudo apt-mark hold nonecms

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

dnf --showduplicates list nonecms sudo dnf downgrade nonecms-<VERSION_BEFORE_1.3.0> sudo dnf versionlock add nonecms

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-2020-18282?

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

Is CVE-2020-18282 being exploited?

CVE-2020-18282 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-2020-18282 affect?

CVE-2020-18282 affects nonecms. Severity is medium (CVSS 6.1). Cross-site scripting (XSS) vulnerability in NoneCms 1.3.0 allows remote attackers to inject arbitrary web script or HTML via feedback feature.

How urgent is CVE-2020-18282?

Priority 37/100. Public exploit reference

References

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