CVE-2020-19000: Cross Site Scripting (XSS) in Simiki v1.6.2.1 and prior allows remote attackers to execute arbitrary code via

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MEDIUM 6.1DOWNGRADE

CVE-2020-19000 is a medium-severity flaw (CVSS 6.1) affecting simiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) in Simiki v1.6.2.1 and prior allows remote attackers to execute arbitrary code via line 54 of the component 'simiki/blob/master/simiki/generators.py'.

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	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-08-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simiki project

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

Am I affected?

Timeline

2021-08-27 19:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

simiki project simiki DOWNGRADE

Affected: 1.6.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6.2.1 (Debian / Ubuntu)

apt-cache madison simiki sudo apt install simiki=<VERSION_BEFORE_1.6.2.1> sudo apt-mark hold simiki

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

dnf --showduplicates list simiki sudo dnf downgrade simiki-<VERSION_BEFORE_1.6.2.1> sudo dnf versionlock add simiki

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-2020-19000?

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

Is CVE-2020-19000 being exploited?

CVE-2020-19000 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-2020-19000 affect?

CVE-2020-19000 affects simiki. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) in Simiki v1.6.2.1 and prior allows remote attackers to execute arbitrary code via line 54 of the component 'simiki/blob/master/simiki/generators.py'.

How urgent is CVE-2020-19000?

Priority 43/100. Public exploit reference

Related CVEs

CVE-2020-19001 CRITICAL 9.8 DOWNGRADE Command Injection in Simiki v1.6.2.1 and prior allows remote attackers to execute arbitrary system commands vi

References

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