CVE-2020-13890: The Neon theme 2.0 before 2020-06-03 for Bootstrap allows XSS via an Add Task Input operation in a dashboard.

Routine

MEDIUM 5.4UPGRADE

CVE-2020-13890 is a medium-severity flaw (CVSS 5.4) affecting neon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Neon theme 2.0 before 2020-06-03 for Bootstrap allows XSS via an Add Task Input operation in a dashboard.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-06-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: laborator

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

Am I affected?

Timeline

2020-06-06 21:15 UTCPublished CVE record published
2026-06-17 02:53 UTCUpdated Record last modified

laborator neon UPGRADE

Affected: >= 2.0 and < 2020-06-03

Fixed in: 2020-06-03

Safe to downgrade to: a release before 2.0

1. Check installed version

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

2. UPGRADE to 2020-06-03 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade neon

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade neon

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison neon sudo apt install neon=<VERSION_BEFORE_2.0> sudo apt-mark hold neon

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list neon sudo dnf downgrade neon-<VERSION_BEFORE_2.0> sudo dnf versionlock add neon

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-2020-13890?

neon: upgrade to 2020-06-03. Exact commands for each OS are on this page.

Is CVE-2020-13890 being exploited?

CVE-2020-13890 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-2020-13890 affect?

CVE-2020-13890 affects neon. Severity is medium (CVSS 5.4). The Neon theme 2.0 before 2020-06-03 for Bootstrap allows XSS via an Add Task Input operation in a dashboard.

How urgent is CVE-2020-13890?

Priority 35/100. Public exploit reference

Software pages

Bootstrap vulnerabilities

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References

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