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MEDIUM severity

Cross Site Scripting (XSS) in SimikiGHSA-fqr5-qphf-vfr8

MEDIUM

GHSA-fqr5-qphf-vfr8 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in simiki. 1 public exploit reference exists, so weaponization risk is real. A fix is available for simiki — see the affected versions and patch details below.

Also known asCVE-2020-19000PYSEC-2021-347
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk
0.00%0.54%1.08%1.62%0.4%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-fqr5-qphf-vfr8 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐍simiki

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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'.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIsimikiall versions1.6.2.2pip install --upgrade 'simiki==1.6.2.2'

Affected Products

1 product · 1 configurations
Application
simikisimiki_project
1 version
1.6.2.1
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Cross Site Scripting (XSS) in Simiki v1.6.2.1 and prior allows remote at…

github.comNVDSep 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for simiki, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update simiki to 1.6.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fqr5-qphf-vfr8 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

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'.
O3 Security · Impact-Aware SCA

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Cross Site Scripting (XSS) in Simiki (Medium 6.1)